diff --git a/build.zig b/build.zig
index fa4e8549d2..409a33521f 100644
--- a/build.zig
+++ b/build.zig
@@ -17,6 +17,7 @@ pub fn build(b: *std.Build) void {
     const fmt_step = b.step("fmt", "Format all zig code");
     const check_fmt_step = b.step("check-fmt", "Check formatting of all zig code");
     const snapshot_step = b.step("snapshot", "Run the snapshot tool to update snapshot files");
+    const update_expected_step = b.step("update-expected", "Update EXPECTED sections based on PROBLEMS in snapshots");
 
     // general configuration
     const target = b.standardTargetOptions(.{ .default_target = .{
@@ -75,6 +76,17 @@ pub fn build(b: *std.Build) void {
     add_tracy(b, build_options, snapshot_exe, target, false, tracy);
     install_and_run(b, no_bin, snapshot_exe, snapshot_step, snapshot_step);
 
+    // Add update-expected tool
+    const update_expected_exe = b.addExecutable(.{
+        .name = "update-expected",
+        .root_source_file = b.path("src/update_expected.zig"),
+        .target = target,
+        .optimize = optimize,
+        .link_libc = true,
+    });
+    add_tracy(b, build_options, update_expected_exe, target, false, tracy);
+    install_and_run(b, no_bin, update_expected_exe, update_expected_step, update_expected_step);
+
     const all_tests = b.addTest(.{
         .root_source_file = b.path("src/test.zig"),
         .target = target,
diff --git a/src/snapshot.zig b/src/snapshot.zig
index 143709a469..6dacb0e28d 100644
--- a/src/snapshot.zig
+++ b/src/snapshot.zig
@@ -781,7 +781,7 @@ fn generateSourceSection(output: *DualOutput, content: *const Content) !void {
 }
 
 /// Generate EXPECTED section for both markdown and HTML
-fn generateExpectedSection(output: *DualOutput, parse_ast: *AST, can_ir: *CIR, _: *Solver, snapshot_path: []const u8, source: []const u8, module_env: *base.ModuleEnv) !void {
+fn generateExpectedSection(output: *DualOutput, content: *const Content) !void {
     try output.begin_section("EXPECTED");
 
     // HTML EXPECTED section
@@ -789,205 +789,24 @@ fn generateExpectedSection(output: *DualOutput, parse_ast: *AST, can_ir: *CIR, _
         \\                <div class="expected">
     );
 
-    var has_problems = false;
+    if (content.expected) |expected| {
+        try output.md_writer.writeAll(expected);
+        try output.md_writer.writeByte('\n');
 
-    // Extract basename from snapshot_path for location reporting
-    const basename = std.fs.path.basename(snapshot_path);
-
-    // Check for tokenize diagnostics
-    for (parse_ast.tokenize_diagnostics.items) |diagnostic| {
-        has_problems = true;
-        const region = diagnostic.region;
-        const info = module_env.calcRegionInfo(source, region.start.offset, region.end.offset) catch |err| {
-            std.log.warn("Failed to calculate region info for tokenize diagnostic: {}", .{err});
-            continue;
-        };
-        try output.md_writer.print("{s} - {s}:{d}:{d}:{d}:{d}\n", .{
-            @tagName(diagnostic.tag),
-            basename,
-            info.start_line_idx + 1,
-            info.start_col_idx + 1,
-            info.end_line_idx + 1,
-            info.end_col_idx + 1,
-        });
-    }
-
-    // Check for parser diagnostics
-    for (parse_ast.parse_diagnostics.items) |diagnostic| {
-        has_problems = true;
-        const region = parse_ast.tokenizedRegionToRegion(diagnostic.region);
-        const info = module_env.calcRegionInfo(source, region.start.offset, region.end.offset) catch |err| {
-            std.log.warn("Failed to calculate region info for parse diagnostic: {}", .{err});
-            continue;
-        };
-        const problem_name = switch (diagnostic.tag) {
-            .expr_unexpected_token => "UNEXPECTED TOKEN IN EXPRESSION",
-            .pattern_unexpected_token => "UNEXPECTED TOKEN IN PATTERN",
-            .ty_anno_unexpected_token => "UNEXPECTED TOKEN IN TYPE ANNOTATION",
-            else => @tagName(diagnostic.tag),
-        };
-        try output.md_writer.print("{s} - {s}:{d}:{d}:{d}:{d}\n", .{
-            problem_name,
-            basename,
-            info.start_line_idx + 1,
-            info.start_col_idx + 1,
-            info.end_line_idx + 1,
-            info.end_col_idx + 1,
-        });
-    }
-
-    // Check for canonicalization diagnostics
-    const diagnostics = can_ir.getDiagnostics();
-    defer output.gpa.free(diagnostics);
-    for (diagnostics) |diagnostic| {
-        // Extract region from the union
-        const region = switch (diagnostic) {
-            .not_implemented => |d| d.region,
-            .invalid_num_literal => |d| d.region,
-            .invalid_single_quote => |d| d.region,
-            .too_long_single_quote => |d| d.region,
-            .empty_single_quote => |d| d.region,
-            .empty_tuple => |d| d.region,
-            .ident_already_in_scope => |d| d.region,
-            .ident_not_in_scope => |d| d.region,
-            .expr_not_canonicalized => |d| d.region,
-            .invalid_string_interpolation => |d| d.region,
-            .type_redeclared => |d| d.redeclared_region,
-            .undeclared_type => |d| d.region,
-            .undeclared_type_var => |d| d.region,
-            .unused_variable => |d| d.region,
-            .used_underscore_variable => |d| d.region,
-            .malformed_type_annotation => |d| d.region,
-            .invalid_top_level_statement => continue, // no region
-            else => continue, // skip unknown diagnostics
-        };
-
-        has_problems = true;
-        const info = module_env.calcRegionInfo(source, region.start.offset, region.end.offset) catch |err| {
-            std.log.warn("Failed to calculate region info for canonicalize diagnostic: {}", .{err});
-            continue;
-        };
-        const problem_name = switch (diagnostic) {
-            .ident_already_in_scope => "DUPLICATE DEFINITION",
-            .ident_not_in_scope => "UNDEFINED VARIABLE",
-            .undeclared_type => "UNDECLARED TYPE",
-            .type_redeclared => "TYPE REDECLARED",
-            .malformed_type_annotation => "MALFORMED TYPE",
-            .unused_variable => "UNUSED VARIABLE",
-            else => @tagName(diagnostic),
-        };
-        try output.md_writer.print("{s} - {s}:{d}:{d}:{d}:{d}\n", .{
-            problem_name,
-            basename,
-            info.start_line_idx + 1,
-            info.start_col_idx + 1,
-            info.end_line_idx + 1,
-            info.end_col_idx + 1,
-        });
-    }
-
-    // Note: Type checking problems don't have regions directly associated with them
-    // They are found during type checking, not parsing
-
-    if (!has_problems) {
+        // For HTML, escape the expected content
+        for (expected) |char| {
+            switch (char) {
+                '<' => try output.html_writer.writeAll("&lt;"),
+                '>' => try output.html_writer.writeAll("&gt;"),
+                '&' => try output.html_writer.writeAll("&amp;"),
+                '"' => try output.html_writer.writeAll("&quot;"),
+                '\'' => try output.html_writer.writeAll("&#39;"),
+                else => try output.html_writer.writeByte(char),
+            }
+        }
+    } else {
         try output.md_writer.writeAll("NIL\n");
         try output.html_writer.writeAll("                    <p>NIL</p>");
-    } else {
-        // For HTML, show the expected problems
-        try output.html_writer.writeAll("                    <pre>");
-
-        // Re-generate all diagnostics for HTML
-
-        // Tokenize diagnostics
-        for (parse_ast.tokenize_diagnostics.items) |diagnostic| {
-            const region = diagnostic.region;
-            const info = module_env.calcRegionInfo(source, region.start.offset, region.end.offset) catch |err| {
-                std.log.warn("Failed to calculate region info for parse diagnostic (HTML): {}", .{err});
-                continue;
-            };
-            try output.html_writer.print("{s} - {s}:{d}:{d}:{d}:{d}\n", .{
-                @tagName(diagnostic.tag),
-                basename,
-                info.start_line_idx + 1,
-                info.start_col_idx + 1,
-                info.end_line_idx + 1,
-                info.end_col_idx + 1,
-            });
-        }
-
-        // Parser diagnostics
-        for (parse_ast.parse_diagnostics.items) |diagnostic| {
-            const region = parse_ast.tokenizedRegionToRegion(diagnostic.region);
-            const info = module_env.calcRegionInfo(source, region.start.offset, region.end.offset) catch |err| {
-                std.log.warn("Failed to calculate region info for tokenize diagnostic (HTML): {}", .{err});
-                continue;
-            };
-            const problem_name = switch (diagnostic.tag) {
-                .expr_unexpected_token => "UNEXPECTED TOKEN IN EXPRESSION",
-                .pattern_unexpected_token => "UNEXPECTED TOKEN IN PATTERN",
-                .ty_anno_unexpected_token => "UNEXPECTED TOKEN IN TYPE ANNOTATION",
-                else => @tagName(diagnostic.tag),
-            };
-            try output.html_writer.print("{s} - {s}:{d}:{d}:{d}:{d}\n", .{
-                problem_name,
-                basename,
-                info.start_line_idx + 1,
-                info.start_col_idx + 1,
-                info.end_line_idx + 1,
-                info.end_col_idx + 1,
-            });
-        }
-
-        // Canonicalization diagnostics
-        for (diagnostics) |diagnostic| {
-            // Extract region from the union
-            const region = switch (diagnostic) {
-                .not_implemented => |d| d.region,
-                .invalid_num_literal => |d| d.region,
-                .invalid_single_quote => |d| d.region,
-                .too_long_single_quote => |d| d.region,
-                .empty_single_quote => |d| d.region,
-                .empty_tuple => |d| d.region,
-                .ident_already_in_scope => |d| d.region,
-                .ident_not_in_scope => |d| d.region,
-                .expr_not_canonicalized => |d| d.region,
-                .invalid_string_interpolation => |d| d.region,
-                .type_redeclared => |d| d.redeclared_region,
-                .undeclared_type => |d| d.region,
-                .undeclared_type_var => |d| d.region,
-                .unused_variable => |d| d.region,
-                .used_underscore_variable => |d| d.region,
-                .malformed_type_annotation => |d| d.region,
-                .invalid_top_level_statement => continue, // no region
-                else => continue, // skip unknown diagnostics
-            };
-
-            const problem_name = switch (diagnostic) {
-                .ident_already_in_scope => "DUPLICATE DEFINITION",
-                .ident_not_in_scope => "UNDEFINED VARIABLE",
-                .undeclared_type => "UNDECLARED TYPE",
-                .type_redeclared => "TYPE REDECLARED",
-                .malformed_type_annotation => "MALFORMED TYPE",
-                .unused_variable => "UNUSED VARIABLE",
-                else => @tagName(diagnostic),
-            };
-            const info = module_env.calcRegionInfo(source, region.start.offset, region.end.offset) catch |err| {
-                std.log.warn("Failed to calculate region info for canonicalize diagnostic (HTML): {}", .{err});
-                continue;
-            };
-            try output.html_writer.print("{s} - {s}:{d}:{d}:{d}:{d}\n", .{
-                problem_name,
-                basename,
-                info.start_line_idx + 1,
-                info.start_col_idx + 1,
-                info.end_line_idx + 1,
-                info.end_col_idx + 1,
-            });
-        }
-
-        // Note: Type checking problems don't have regions directly associated with them
-
-        try output.html_writer.writeAll("</pre>");
     }
 
     try output.html_writer.writeAll(
@@ -1623,7 +1442,7 @@ fn processSnapshotFileUnified(gpa: Allocator, snapshot_path: []const u8, maybe_f
     // Generate all sections simultaneously
     try generateMetaSection(&output, &content);
     try generateSourceSection(&output, &content);
-    try generateExpectedSection(&output, &parse_ast, &can_ir, &solver, snapshot_path, content.source, &module_env);
+    try generateExpectedSection(&output, &content);
     try generateProblemsSection(&output, &parse_ast, &can_ir, &solver, &content, snapshot_path, &module_env);
     try generateTokensSection(&output, &parse_ast, &content, &module_env);
 
diff --git a/src/snapshot_expected_test.zig b/src/snapshot_expected_test.zig
index 010bde534e..a62db77019 100644
--- a/src/snapshot_expected_test.zig
+++ b/src/snapshot_expected_test.zig
@@ -247,8 +247,10 @@ fn validateSnapshotProblems(allocator: std.mem.Allocator, path: []const u8) !voi
     defer allocator.free(content);
 
     const expected_section = extractSection(content, "EXPECTED") orelse {
-        // No EXPECTED section is OK - some snapshots might not have it yet
-        return;
+        // EXPECTED section is required for all snapshots
+        std.debug.print("\n❌ {s}:\n", .{std.fs.path.basename(path)});
+        std.debug.print("  Missing EXPECTED section\n", .{});
+        return error.MissingExpectedSection;
     };
 
     const problems_section = extractSection(content, "PROBLEMS") orelse {
@@ -373,7 +375,7 @@ test "snapshot validation" {
     // Validate each snapshot
     for (snapshot_files.items) |snapshot_path| {
         validateSnapshotProblems(allocator, snapshot_path) catch |err| {
-            if (err == error.SnapshotValidationFailed) {
+            if (err == error.SnapshotValidationFailed or err == error.MissingExpectedSection) {
                 total_failures += 1;
                 try failed_files.append(snapshot_path);
             } else {
diff --git a/src/snapshots/add_var_with_spaces.md b/src/snapshots/add_var_with_spaces.md
index 59659b7d6b..7afa255f95 100644
--- a/src/snapshots/add_var_with_spaces.md
+++ b/src/snapshots/add_var_with_spaces.md
@@ -10,9 +10,12 @@ module [add2]
 add2 = x +      2
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - add_var_with_spaces.md:3:8:3:9
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 KwModule(1:1-1:7),OpenSquare(1:8-1:9),LowerIdent(1:9-1:13),CloseSquare(1:13-1:14),Newline(1:1-1:1),
diff --git a/src/snapshots/binop_omnibus__single__no_spaces.md b/src/snapshots/binop_omnibus__single__no_spaces.md
index 29edb5a056..b7d94d70a8 100644
--- a/src/snapshots/binop_omnibus__single__no_spaces.md
+++ b/src/snapshots/binop_omnibus__single__no_spaces.md
@@ -8,9 +8,12 @@ type=expr
 Err(foo)??12>5*5 or 13+2<5 and 10-1>=16 or 12<=3/5
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - binop_omnibus__single__no_spaces.md:1:5:1:8
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `foo` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 UpperIdent(1:1-1:4),NoSpaceOpenRound(1:4-1:5),LowerIdent(1:5-1:8),CloseRound(1:8-1:9),OpDoubleQuestion(1:9-1:11),Int(1:11-1:13),OpGreaterThan(1:13-1:14),Int(1:14-1:15),OpStar(1:15-1:16),Int(1:16-1:17),OpOr(1:18-1:20),Int(1:21-1:23),OpPlus(1:23-1:24),Int(1:24-1:25),OpLessThan(1:25-1:26),Int(1:26-1:27),OpAnd(1:28-1:31),Int(1:32-1:34),OpBinaryMinus(1:34-1:35),Int(1:35-1:36),OpGreaterThanOrEq(1:36-1:38),Int(1:38-1:40),OpOr(1:41-1:43),Int(1:44-1:46),OpLessThanOrEq(1:46-1:48),Int(1:48-1:49),OpSlash(1:49-1:50),Int(1:50-1:51),EndOfFile(1:51-1:51),
diff --git a/src/snapshots/binop_omnibus__singleline.md b/src/snapshots/binop_omnibus__singleline.md
index bd1e86f224..d91ac55825 100644
--- a/src/snapshots/binop_omnibus__singleline.md
+++ b/src/snapshots/binop_omnibus__singleline.md
@@ -8,9 +8,12 @@ type=expr
 Err(foo) ?? 12 > 5 * 5 or 13 + 2 < 5 and 10 - 1 >= 16 or 12 <= 3 / 5
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - binop_omnibus__singleline.md:1:5:1:8
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `foo` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 UpperIdent(1:1-1:4),NoSpaceOpenRound(1:4-1:5),LowerIdent(1:5-1:8),CloseRound(1:8-1:9),OpDoubleQuestion(1:10-1:12),Int(1:13-1:15),OpGreaterThan(1:16-1:17),Int(1:18-1:19),OpStar(1:20-1:21),Int(1:22-1:23),OpOr(1:24-1:26),Int(1:27-1:29),OpPlus(1:30-1:31),Int(1:32-1:33),OpLessThan(1:34-1:35),Int(1:36-1:37),OpAnd(1:38-1:41),Int(1:42-1:44),OpBinaryMinus(1:45-1:46),Int(1:47-1:48),OpGreaterThanOrEq(1:49-1:51),Int(1:52-1:54),OpOr(1:55-1:57),Int(1:58-1:60),OpLessThanOrEq(1:61-1:63),Int(1:64-1:65),OpSlash(1:66-1:67),Int(1:68-1:69),EndOfFile(1:69-1:69),
diff --git a/src/snapshots/can_basic_scoping.md b/src/snapshots/can_basic_scoping.md
index 3220e9bf8e..50ede0c158 100644
--- a/src/snapshots/can_basic_scoping.md
+++ b/src/snapshots/can_basic_scoping.md
@@ -23,9 +23,26 @@ outerFunc = |_| {
 }
 ~~~
 # EXPECTED
-NIL
+DUPLICATE DEFINITION - can_basic_scoping.md:9:5:9:6
 # PROBLEMS
-NIL
+**DUPLICATE DEFINITION**
+The name `x` is being redeclared in this scope.
+
+The redeclaration is here:
+**can_basic_scoping.md:9:5:9:6:**
+```roc
+    x = 20  # Should shadow top-level x
+```
+    ^
+
+But `x` was already defined here:
+**can_basic_scoping.md:4:1:4:2:**
+```roc
+x = 5
+```
+^
+
+
 # TOKENS
 ~~~zig
 KwModule(1:1-1:7),OpenSquare(1:8-1:9),CloseSquare(1:9-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/can_dot_access.md b/src/snapshots/can_dot_access.md
index 1741bd9aae..9397538ced 100644
--- a/src/snapshots/can_dot_access.md
+++ b/src/snapshots/can_dot_access.md
@@ -8,10 +8,16 @@ type=expr
 list.map(fn)
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - can_dot_access.md:1:1:1:5
-UNDEFINED VARIABLE - can_dot_access.md:1:10:1:12
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `list` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `fn` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),NoSpaceDotLowerIdent(1:5-1:9),NoSpaceOpenRound(1:9-1:10),LowerIdent(1:10-1:12),CloseRound(1:12-1:13),EndOfFile(1:13-1:13),
diff --git a/src/snapshots/can_import_exposing_types.md b/src/snapshots/can_import_exposing_types.md
index 2cf3ab4bfb..51f7c65bc6 100644
--- a/src/snapshots/can_import_exposing_types.md
+++ b/src/snapshots/can_import_exposing_types.md
@@ -61,36 +61,10 @@ combineResults = |jsonResult, httpStatus|
     }
 ~~~
 # EXPECTED
-expected_expr_close_curly_or_comma - can_import_exposing_types.md:52:45:52:51
-expected_expr_apply_close_round - can_import_exposing_types.md:52:22:52:25
+PARSE ERROR - can_import_exposing_types.md:52:45:52:51
+PARSE ERROR - can_import_exposing_types.md:52:22:52:25
 UNEXPECTED TOKEN IN EXPRESSION - can_import_exposing_types.md:52:71:52:73
-UNEXPECTED TOKEN IN EXPRESSION - can_import_exposing_types.md:1:1:53:12
-UNDECLARED TYPE - can_import_exposing_types.md:31:18:31:24
-UNDECLARED TYPE - can_import_exposing_types.md:32:18:32:24
-UNDECLARED TYPE - can_import_exposing_types.md:33:23:33:31
-UNDECLARED TYPE - can_import_exposing_types.md:8:27:8:32
-UNDECLARED TYPE - can_import_exposing_types.md:8:34:8:39
-UNDECLARED TYPE - can_import_exposing_types.md:12:17:12:24
-UNDECLARED TYPE - can_import_exposing_types.md:12:28:12:36
-UNDECLARED TYPE - can_import_exposing_types.md:22:15:22:21
-UNDECLARED TYPE - can_import_exposing_types.md:22:28:22:33
-UNDECLARED TYPE - can_import_exposing_types.md:22:50:22:55
-UNDECLARED TYPE - can_import_exposing_types.md:22:58:22:63
-UNDEFINED VARIABLE - can_import_exposing_types.md:24:5:24:16
-UNDECLARED TYPE - can_import_exposing_types.md:37:16:37:22
-UNDECLARED TYPE - can_import_exposing_types.md:41:18:41:26
-UNDEFINED VARIABLE - can_import_exposing_types.md:45:23:45:37
-UNDECLARED TYPE - can_import_exposing_types.md:49:25:49:30
-UNDECLARED TYPE - can_import_exposing_types.md:49:32:49:37
-UNDECLARED TYPE - can_import_exposing_types.md:49:40:49:46
-UNDECLARED TYPE - can_import_exposing_types.md:49:57:49:65
-UNDECLARED TYPE - can_import_exposing_types.md:49:67:49:72
-expr_not_canonicalized - can_import_exposing_types.md:52:22:52:70
-UNUSED VARIABLE - can_import_exposing_types.md:52:12:52:17
-expr_not_canonicalized - can_import_exposing_types.md:52:71:52:73
-UNUSED VARIABLE - can_import_exposing_types.md:52:60:52:70
-expr_not_canonicalized - can_import_exposing_types.md:1:1:53:12
-UNUSED VARIABLE - can_import_exposing_types.md:50:31:50:41
+UNEXPECTED TOKEN IN PATTERN - can_import_exposing_types.md:52:72:52:72
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `expected_expr_close_curly_or_comma`
@@ -255,6 +229,281 @@ combineResults = |jsonResult, httpStatus|
 ```
 
 
+**UNDECLARED TYPE**
+The type ``Config`` is not declared in this scope.
+
+This type is referenced here:
+**can_import_exposing_types.md:31:18:31:24:**
+```roc
+    jsonConfig : Config,
+```
+                 ^^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Status`` is not declared in this scope.
+
+This type is referenced here:
+**can_import_exposing_types.md:32:18:32:24:**
+```roc
+    httpStatus : Status,
+```
+                 ^^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Response`` is not declared in this scope.
+
+This type is referenced here:
+**can_import_exposing_types.md:33:23:33:31:**
+```roc
+    defaultResponse : Response,
+```
+                      ^^^^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Value`` is not declared in this scope.
+
+This type is referenced here:
+**can_import_exposing_types.md:8:27:8:32:**
+```roc
+parseJson : Str -> Result(Value, Error)
+```
+                          ^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Error`` is not declared in this scope.
+
+This type is referenced here:
+**can_import_exposing_types.md:8:34:8:39:**
+```roc
+parseJson : Str -> Result(Value, Error)
+```
+                                 ^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Request`` is not declared in this scope.
+
+This type is referenced here:
+**can_import_exposing_types.md:12:17:12:24:**
+```roc
+handleRequest : Request -> Response
+```
+                ^^^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Response`` is not declared in this scope.
+
+This type is referenced here:
+**can_import_exposing_types.md:12:28:12:36:**
+```roc
+handleRequest : Request -> Response
+```
+                           ^^^^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Config`` is not declared in this scope.
+
+This type is referenced here:
+**can_import_exposing_types.md:22:15:22:21:**
+```roc
+processData : Config, List(Value) -> Result(List(Value), Error)
+```
+              ^^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Value`` is not declared in this scope.
+
+This type is referenced here:
+**can_import_exposing_types.md:22:28:22:33:**
+```roc
+processData : Config, List(Value) -> Result(List(Value), Error)
+```
+                           ^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Value`` is not declared in this scope.
+
+This type is referenced here:
+**can_import_exposing_types.md:22:50:22:55:**
+```roc
+processData : Config, List(Value) -> Result(List(Value), Error)
+```
+                                                 ^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Error`` is not declared in this scope.
+
+This type is referenced here:
+**can_import_exposing_types.md:22:58:22:63:**
+```roc
+processData : Config, List(Value) -> Result(List(Value), Error)
+```
+                                                         ^^^^^
+
+
+**UNDEFINED VARIABLE**
+Nothing is named `mapTry` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDECLARED TYPE**
+The type ``Config`` is not declared in this scope.
+
+This type is referenced here:
+**can_import_exposing_types.md:37:16:37:22:**
+```roc
+createClient : Config -> Http.Client
+```
+               ^^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Response`` is not declared in this scope.
+
+This type is referenced here:
+**can_import_exposing_types.md:41:18:41:26:**
+```roc
+handleResponse : Response -> Str
+```
+                 ^^^^^^^^
+
+
+**UNDEFINED VARIABLE**
+Nothing is named `toString` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDECLARED TYPE**
+The type ``Value`` is not declared in this scope.
+
+This type is referenced here:
+**can_import_exposing_types.md:49:25:49:30:**
+```roc
+combineResults : Result(Value, Error), Status -> Result(Response, Error)
+```
+                        ^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Error`` is not declared in this scope.
+
+This type is referenced here:
+**can_import_exposing_types.md:49:32:49:37:**
+```roc
+combineResults : Result(Value, Error), Status -> Result(Response, Error)
+```
+                               ^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Status`` is not declared in this scope.
+
+This type is referenced here:
+**can_import_exposing_types.md:49:40:49:46:**
+```roc
+combineResults : Result(Value, Error), Status -> Result(Response, Error)
+```
+                                       ^^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Response`` is not declared in this scope.
+
+This type is referenced here:
+**can_import_exposing_types.md:49:57:49:65:**
+```roc
+combineResults : Result(Value, Error), Status -> Result(Response, Error)
+```
+                                                        ^^^^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Error`` is not declared in this scope.
+
+This type is referenced here:
+**can_import_exposing_types.md:49:67:49:72:**
+```roc
+combineResults : Result(Value, Error), Status -> Result(Response, Error)
+```
+                                                                  ^^^^^
+
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**UNUSED VARIABLE**
+Variable ``value`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_value` to suppress this warning.
+The unused variable is declared here:
+**can_import_exposing_types.md:52:12:52:17:**
+```roc
+        Ok(value) => Ok({ body: Json.encode value, status: httpStatus })
+```
+           ^^^^^
+
+
+**DUPLICATE DEFINITION**
+The name `httpStatus` is being redeclared in this scope.
+
+The redeclaration is here:
+**can_import_exposing_types.md:52:60:52:70:**
+```roc
+        Ok(value) => Ok({ body: Json.encode value, status: httpStatus })
+```
+                                                           ^^^^^^^^^^
+
+But `httpStatus` was already defined here:
+**can_import_exposing_types.md:50:31:50:41:**
+```roc
+combineResults = |jsonResult, httpStatus|
+```
+                              ^^^^^^^^^^
+
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**UNUSED VARIABLE**
+Variable ``httpStatus`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_httpStatus` to suppress this warning.
+The unused variable is declared here:
+**can_import_exposing_types.md:52:60:52:70:**
+```roc
+        Ok(value) => Ok({ body: Json.encode value, status: httpStatus })
+```
+                                                           ^^^^^^^^^^
+
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**UNUSED VARIABLE**
+Variable ``httpStatus`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_httpStatus` to suppress this warning.
+The unused variable is declared here:
+**can_import_exposing_types.md:50:31:50:41:**
+```roc
+combineResults = |jsonResult, httpStatus|
+```
+                              ^^^^^^^^^^
+
+
 # TOKENS
 ~~~zig
 KwModule(1:1-1:7),OpenSquare(1:8-1:9),CloseSquare(1:9-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/can_import_nested_modules.md b/src/snapshots/can_import_nested_modules.md
index 1aa4a8f83e..f55921ddcd 100644
--- a/src/snapshots/can_import_nested_modules.md
+++ b/src/snapshots/can_import_nested_modules.md
@@ -33,17 +33,13 @@ validateAuth : HttpAuth.Credentials -> Result(HttpAuth.Token, HttpAuth.Error)
 validateAuth = |creds| HttpAuth.validate(creds)
 ~~~
 # EXPECTED
+UNEXPECTED TOKEN IN EXPRESSION - can_import_nested_modules.md:3:19:3:19
 UNEXPECTED TOKEN IN EXPRESSION - can_import_nested_modules.md:4:19:4:27
 UNEXPECTED TOKEN IN EXPRESSION - can_import_nested_modules.md:4:25:4:36
+PARSE ERROR - can_import_nested_modules.md:4:28:4:28
 UNEXPECTED TOKEN IN EXPRESSION - can_import_nested_modules.md:5:13:5:27
 UNEXPECTED TOKEN IN EXPRESSION - can_import_nested_modules.md:5:20:5:36
 UNEXPECTED TOKEN IN EXPRESSION - can_import_nested_modules.md:5:28:5:38
-UNDEFINED VARIABLE - can_import_nested_modules.md:9:26:9:41
-UNDEFINED VARIABLE - can_import_nested_modules.md:13:29:13:43
-UNDEFINED VARIABLE - can_import_nested_modules.md:18:5:18:37
-UNDEFINED VARIABLE - can_import_nested_modules.md:22:23:22:30
-UNDEFINED VARIABLE - can_import_nested_modules.md:22:37:22:58
-UNDEFINED VARIABLE - can_import_nested_modules.md:26:24:26:41
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token  is not expected in an expression.
@@ -141,6 +137,62 @@ import utils.String.Format exposing [padLeft]
                            ^^^^^^^^^^
 
 
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**UNDEFINED VARIABLE**
+Nothing is named `toString` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `login` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `parseWith` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `padLeft` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `defaultPadding` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `validate` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 KwModule(1:1-1:7),OpenSquare(1:8-1:9),CloseSquare(1:9-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/can_import_type_annotations.md b/src/snapshots/can_import_type_annotations.md
index 9f2a16936e..4e0426f88d 100644
--- a/src/snapshots/can_import_type_annotations.md
+++ b/src/snapshots/can_import_type_annotations.md
@@ -46,14 +46,13 @@ combineResults = |result1, result2|
     }
 ~~~
 # EXPECTED
-expected_expr_apply_close_round - can_import_type_annotations.md:17:21:17:24
+PARSE ERROR - can_import_type_annotations.md:17:21:17:24
+UNEXPECTED TOKEN IN PATTERN - can_import_type_annotations.md:17:41:17:41
 UNEXPECTED TOKEN IN EXPRESSION - can_import_type_annotations.md:1:1:18:12
 UNDECLARED TYPE - can_import_type_annotations.md:7:18:7:25
 UNDECLARED TYPE - can_import_type_annotations.md:7:29:7:37
 UNUSED VARIABLE - can_import_type_annotations.md:8:19:8:22
-expr_not_canonicalized - can_import_type_annotations.md:17:21:17:42
-UNUSED VARIABLE - can_import_type_annotations.md:17:12:17:16
-expr_not_canonicalized - can_import_type_annotations.md:1:1:18:12
+UNKNOWN OPERATOR - can_import_type_annotations.md:17:12:17:16
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `expected_expr_apply_close_round`
@@ -124,6 +123,63 @@ handleApi = |request| {
 ```
 
 
+**UNDECLARED TYPE**
+The type ``Request`` is not declared in this scope.
+
+This type is referenced here:
+**can_import_type_annotations.md:7:18:7:25:**
+```roc
+processRequest : Request -> Response
+```
+                 ^^^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Response`` is not declared in this scope.
+
+This type is referenced here:
+**can_import_type_annotations.md:7:29:7:37:**
+```roc
+processRequest : Request -> Response
+```
+                            ^^^^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``req`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_req` to suppress this warning.
+The unused variable is declared here:
+**can_import_type_annotations.md:8:19:8:22:**
+```roc
+processRequest = |req| Http.defaultResponse
+```
+                  ^^^
+
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**UNUSED VARIABLE**
+Variable ``data`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_data` to suppress this warning.
+The unused variable is declared here:
+**can_import_type_annotations.md:17:12:17:16:**
+```roc
+        Ok(data) => Ok(Http.success data)
+```
+           ^^^^
+
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
 # TOKENS
 ~~~zig
 KwModule(1:1-1:7),OpenSquare(1:8-1:9),CloseSquare(1:9-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/can_import_unresolved_qualified.md b/src/snapshots/can_import_unresolved_qualified.md
index 199bf9c70b..8adaf1c3c6 100644
--- a/src/snapshots/can_import_unresolved_qualified.md
+++ b/src/snapshots/can_import_unresolved_qualified.md
@@ -36,7 +36,18 @@ parser = Json.Parser.Advanced.NonExistent.create
 # EXPECTED
 UNUSED VARIABLE - can_import_unresolved_qualified.md:15:19:15:22
 # PROBLEMS
-NIL
+**UNUSED VARIABLE**
+Variable ``req`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_req` to suppress this warning.
+The unused variable is declared here:
+**can_import_unresolved_qualified.md:15:19:15:22:**
+```roc
+processRequest = |req| Http.Server.defaultResponse
+```
+                  ^^^
+
+
 # TOKENS
 ~~~zig
 KwModule(1:1-1:7),OpenSquare(1:8-1:9),CloseSquare(1:9-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/can_list_number_doesnt_fit.md b/src/snapshots/can_list_number_doesnt_fit.md
index 79b1dc01e5..82f54c3754 100644
--- a/src/snapshots/can_list_number_doesnt_fit.md
+++ b/src/snapshots/can_list_number_doesnt_fit.md
@@ -8,10 +8,14 @@ type=expr
 [1u8, 2u8, 300]
 ~~~
 # EXPECTED
-invalid_num_literal - can_list_number_doesnt_fit.md:1:2:1:5
-invalid_num_literal - can_list_number_doesnt_fit.md:1:7:1:10
-# PROBLEMS
 NIL
+# PROBLEMS
+**INVALID NUMBER**
+This number literal is not valid: 1u8
+
+**INVALID NUMBER**
+This number literal is not valid: 2u8
+
 # TOKENS
 ~~~zig
 OpenSquare(1:1-1:2),Int(1:2-1:5),Comma(1:5-1:6),Int(1:7-1:10),Comma(1:10-1:11),Int(1:12-1:15),CloseSquare(1:15-1:16),EndOfFile(1:16-1:16),
diff --git a/src/snapshots/can_list_rest_types.md b/src/snapshots/can_list_rest_types.md
index 74793ad357..72cb9c234c 100644
--- a/src/snapshots/can_list_rest_types.md
+++ b/src/snapshots/can_list_rest_types.md
@@ -11,10 +11,24 @@ match numbers {
 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - can_list_rest_types.md:1:7:1:14
-UNUSED VARIABLE - can_list_rest_types.md:2:6:2:11
+UNDEFINED VARIABLE - can_list_rest_types.md:2:6:2:11
 # PROBLEMS
-NIL
+**UNDEFINED VARIABLE**
+Nothing is named `numbers` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNUSED VARIABLE**
+Variable ``first`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_first` to suppress this warning.
+The unused variable is declared here:
+**can_list_rest_types.md:2:6:2:11:**
+```roc
+    [first, .. as restNums] => restNums
+```
+     ^^^^^
+
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:14),OpenCurly(1:15-1:16),Newline(1:1-1:1),
diff --git a/src/snapshots/can_var_scoping_invalid_top_level.md b/src/snapshots/can_var_scoping_invalid_top_level.md
index ac4a412144..cb8d0c44e8 100644
--- a/src/snapshots/can_var_scoping_invalid_top_level.md
+++ b/src/snapshots/can_var_scoping_invalid_top_level.md
@@ -11,7 +11,7 @@ module []
 var topLevelVar_ = 0
 ~~~
 # EXPECTED
-var_only_allowed_in_a_body - can_var_scoping_invalid_top_level.md:4:1:4:17
+PARSE ERROR - can_var_scoping_invalid_top_level.md:4:1:4:17
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `var_only_allowed_in_a_body`
diff --git a/src/snapshots/can_var_scoping_regular_var.md b/src/snapshots/can_var_scoping_regular_var.md
index 0221332c1e..7c745117a3 100644
--- a/src/snapshots/can_var_scoping_regular_var.md
+++ b/src/snapshots/can_var_scoping_regular_var.md
@@ -28,9 +28,28 @@ processItems = |items| {
 }
 ~~~
 # EXPECTED
-UNUSED VARIABLE - can_var_scoping_regular_var.md:4:17:4:22
+VAR REASSIGNMENT ERROR - can_var_scoping_regular_var.md:4:17:4:22
 # PROBLEMS
-NIL
+**VAR REASSIGNMENT ERROR**
+Cannot reassign a `var` from outside the function where it was declared.
+Variables declared with `var` can only be reassigned within the same function scope.
+
+**VAR REASSIGNMENT ERROR**
+Cannot reassign a `var` from outside the function where it was declared.
+Variables declared with `var` can only be reassigned within the same function scope.
+
+**UNUSED VARIABLE**
+Variable ``items`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_items` to suppress this warning.
+The unused variable is declared here:
+**can_var_scoping_regular_var.md:4:17:4:22:**
+```roc
+processItems = |items| {
+```
+                ^^^^^
+
+
 # TOKENS
 ~~~zig
 KwModule(1:1-1:7),OpenSquare(1:8-1:9),CloseSquare(1:9-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/can_var_scoping_var_redeclaration.md b/src/snapshots/can_var_scoping_var_redeclaration.md
index cfecd91812..f487c8821e 100644
--- a/src/snapshots/can_var_scoping_var_redeclaration.md
+++ b/src/snapshots/can_var_scoping_var_redeclaration.md
@@ -18,9 +18,39 @@ redeclareTest = |_| {
 result = redeclareTest({})
 ~~~
 # EXPECTED
-UNUSED VARIABLE - can_var_scoping_var_redeclaration.md:6:2:7:4
+DUPLICATE DEFINITION - can_var_scoping_var_redeclaration.md:6:2:7:4
+can_var_scoping_var_redeclaration.md:5:2:6:5: - can_var_scoping_var_redeclaration.md:6:2:7:4
 # PROBLEMS
-NIL
+**DUPLICATE DEFINITION**
+The name `x_` is being redeclared in this scope.
+
+The redeclaration is here:
+**can_var_scoping_var_redeclaration.md:6:2:7:4:**
+```roc
+	var x_ = 10 # Redeclare var - should warn but proceed
+	x_ = 15 # Reassign - should work without warning
+```
+
+But `x_` was already defined here:
+**can_var_scoping_var_redeclaration.md:5:2:6:5:**
+```roc
+	var x_ = 5
+	var x_ = 10 # Redeclare var - should warn but proceed
+```
+
+
+**UNUSED VARIABLE**
+Variable ``x_`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_x_` to suppress this warning.
+The unused variable is declared here:
+**can_var_scoping_var_redeclaration.md:6:2:7:4:**
+```roc
+	var x_ = 10 # Redeclare var - should warn but proceed
+	x_ = 15 # Reassign - should work without warning
+```
+
+
 # TOKENS
 ~~~zig
 KwModule(1:1-1:7),OpenSquare(1:8-1:9),CloseSquare(1:9-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/crash_and_ellipsis_test.md b/src/snapshots/crash_and_ellipsis_test.md
index 9512cd83e0..f9b2d8e002 100644
--- a/src/snapshots/crash_and_ellipsis_test.md
+++ b/src/snapshots/crash_and_ellipsis_test.md
@@ -29,8 +29,7 @@ main! = |_| {
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - crash_and_ellipsis_test.md:9:17:9:24
 UNEXPECTED TOKEN IN EXPRESSION - crash_and_ellipsis_test.md:13:23:13:30
-not_implemented - crash_and_ellipsis_test.md:5:20:5:23
-UNUSED VARIABLE - crash_and_ellipsis_test.md:16:5:16:12
+NOT IMPLEMENTED - crash_and_ellipsis_test.md:16:5:16:12
 UNUSED VARIABLE - crash_and_ellipsis_test.md:17:5:17:12
 UNUSED VARIABLE - crash_and_ellipsis_test.md:18:5:18:12
 # PROBLEMS
@@ -58,6 +57,60 @@ testCrashSimple = |_| crash "oops"
                       ^^^^^^^
 
 
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: ...
+Let us know if you want to help!
+
+**INVALID LAMBDA**
+The body of this lambda expression is not valid.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID LAMBDA**
+The body of this lambda expression is not valid.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**UNUSED VARIABLE**
+Variable ``result1`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_result1` to suppress this warning.
+The unused variable is declared here:
+**crash_and_ellipsis_test.md:16:5:16:12:**
+```roc
+    result1 = testEllipsis(42)
+```
+    ^^^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``result2`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_result2` to suppress this warning.
+The unused variable is declared here:
+**crash_and_ellipsis_test.md:17:5:17:12:**
+```roc
+    result2 = testCrash(42)
+```
+    ^^^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``result3`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_result3` to suppress this warning.
+The unused variable is declared here:
+**crash_and_ellipsis_test.md:18:5:18:12:**
+```roc
+    result3 = testCrashSimple(42)
+```
+    ^^^^^^^
+
+
 # TOKENS
 ~~~zig
 KwApp(1:1-1:4),OpenSquare(1:5-1:6),LowerIdent(1:6-1:11),CloseSquare(1:11-1:12),OpenCurly(1:13-1:14),LowerIdent(1:15-1:17),OpColon(1:17-1:18),KwPlatform(1:19-1:27),StringStart(1:28-1:29),StringPart(1:29-1:54),StringEnd(1:54-1:55),CloseCurly(1:56-1:57),Newline(1:1-1:1),
diff --git a/src/snapshots/expr/apply_function.md b/src/snapshots/expr/apply_function.md
index 5b6f0d813b..ea15dec549 100644
--- a/src/snapshots/expr/apply_function.md
+++ b/src/snapshots/expr/apply_function.md
@@ -8,9 +8,12 @@ type=expr
 foo(42, "hello")
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - apply_function.md:1:1:1:4
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `foo` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:4),NoSpaceOpenRound(1:4-1:5),Int(1:5-1:7),Comma(1:7-1:8),StringStart(1:9-1:10),StringPart(1:10-1:15),StringEnd(1:15-1:16),CloseRound(1:16-1:17),EndOfFile(1:17-1:17),
diff --git a/src/snapshots/expr/block_pattern_unify.md b/src/snapshots/expr/block_pattern_unify.md
index 6c76e6059b..1ec19e8f13 100644
--- a/src/snapshots/expr/block_pattern_unify.md
+++ b/src/snapshots/expr/block_pattern_unify.md
@@ -15,7 +15,18 @@ type=expr
 # EXPECTED
 UNUSED VARIABLE - block_pattern_unify.md:3:5:3:8
 # PROBLEMS
-NIL
+**UNUSED VARIABLE**
+Variable ``str`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_str` to suppress this warning.
+The unused variable is declared here:
+**block_pattern_unify.md:3:5:3:8:**
+```roc
+    str = "hello"
+```
+    ^^^
+
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),Newline(1:1-1:1),
diff --git a/src/snapshots/expr/dbg_stmt.md b/src/snapshots/expr/dbg_stmt.md
index 106de67243..5510fd57b2 100644
--- a/src/snapshots/expr/dbg_stmt.md
+++ b/src/snapshots/expr/dbg_stmt.md
@@ -8,9 +8,12 @@ type=expr
 dbg x
 ~~~
 # EXPECTED
-not_implemented - dbg_stmt.md:1:1:1:1
-# PROBLEMS
 NIL
+# PROBLEMS
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize dbg expression
+Let us know if you want to help!
+
 # TOKENS
 ~~~zig
 KwDbg(1:1-1:4),LowerIdent(1:5-1:6),EndOfFile(1:6-1:6),
diff --git a/src/snapshots/expr/field_access.md b/src/snapshots/expr/field_access.md
index f5ca7b98ea..56b9e29750 100644
--- a/src/snapshots/expr/field_access.md
+++ b/src/snapshots/expr/field_access.md
@@ -8,9 +8,12 @@ type=expr
 person.name
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - field_access.md:1:1:1:7
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `person` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:7),NoSpaceDotLowerIdent(1:7-1:12),EndOfFile(1:12-1:12),
diff --git a/src/snapshots/expr/float_invalid.md b/src/snapshots/expr/float_invalid.md
index ed38cd3930..cc19256b8e 100644
--- a/src/snapshots/expr/float_invalid.md
+++ b/src/snapshots/expr/float_invalid.md
@@ -8,7 +8,7 @@ type=expr
 3.14.15
 ~~~
 # EXPECTED
-expr_no_space_dot_int - float_invalid.md:1:5:1:8
+PARSE ERROR - float_invalid.md:1:5:1:8
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `expr_no_space_dot_int`
diff --git a/src/snapshots/expr/function_call.md b/src/snapshots/expr/function_call.md
index 39f17abadc..5e9f5ad00a 100644
--- a/src/snapshots/expr/function_call.md
+++ b/src/snapshots/expr/function_call.md
@@ -8,9 +8,12 @@ type=expr
 add(5, 3)
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - function_call.md:1:1:1:4
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `add` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:4),NoSpaceOpenRound(1:4-1:5),Int(1:5-1:6),Comma(1:6-1:7),Int(1:8-1:9),CloseRound(1:9-1:10),EndOfFile(1:10-1:10),
diff --git a/src/snapshots/expr/if_expression.md b/src/snapshots/expr/if_expression.md
index 12c58faeb9..fcf3f5c161 100644
--- a/src/snapshots/expr/if_expression.md
+++ b/src/snapshots/expr/if_expression.md
@@ -8,9 +8,12 @@ type=expr
 if x > 5 "big" else "small"
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - if_expression.md:1:4:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 KwIf(1:1-1:3),LowerIdent(1:4-1:5),OpGreaterThan(1:6-1:7),Int(1:8-1:9),StringStart(1:10-1:11),StringPart(1:11-1:14),StringEnd(1:14-1:15),KwElse(1:16-1:20),StringStart(1:21-1:22),StringPart(1:22-1:27),StringEnd(1:27-1:28),EndOfFile(1:28-1:28),
diff --git a/src/snapshots/expr/record_field_update.md b/src/snapshots/expr/record_field_update.md
index 52cecf7242..51f06d818a 100644
--- a/src/snapshots/expr/record_field_update.md
+++ b/src/snapshots/expr/record_field_update.md
@@ -8,9 +8,12 @@ type=expr
 { ..person, age: 31 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - record_field_update.md:1:5:1:11
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `person` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),DoubleDot(1:3-1:5),LowerIdent(1:5-1:11),Comma(1:11-1:12),LowerIdent(1:13-1:16),OpColon(1:16-1:17),Int(1:18-1:20),CloseCurly(1:21-1:22),EndOfFile(1:22-1:22),
diff --git a/src/snapshots/expr/record_field_update_error.md b/src/snapshots/expr/record_field_update_error.md
index 9e8fe0e903..13108c36a2 100644
--- a/src/snapshots/expr/record_field_update_error.md
+++ b/src/snapshots/expr/record_field_update_error.md
@@ -10,8 +10,6 @@ type=expr
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - record_field_update_error.md:1:10:1:15
 UNEXPECTED TOKEN IN TYPE ANNOTATION - record_field_update_error.md:1:17:1:21
-UNDEFINED VARIABLE - record_field_update_error.md:1:3:1:9
-MALFORMED TYPE - record_field_update_error.md:1:17:1:21
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **& age** is not expected in an expression.
@@ -37,6 +35,13 @@ Here is the problematic code:
                 ^^^^
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `person` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**MALFORMED TYPE**
+This type annotation is malformed or contains invalid syntax.
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),LowerIdent(1:3-1:9),OpAmpersand(1:10-1:11),LowerIdent(1:12-1:15),OpColon(1:15-1:16),Int(1:17-1:19),CloseCurly(1:20-1:21),EndOfFile(1:21-1:21),
diff --git a/src/snapshots/expr/string_interpolation_simple.md b/src/snapshots/expr/string_interpolation_simple.md
index 6fed96dc15..7a534443c7 100644
--- a/src/snapshots/expr/string_interpolation_simple.md
+++ b/src/snapshots/expr/string_interpolation_simple.md
@@ -8,9 +8,12 @@ type=expr
 "Hello ${name}!"
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - string_interpolation_simple.md:1:10:1:14
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `name` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 StringStart(1:1-1:2),StringPart(1:2-1:8),OpenStringInterpolation(1:8-1:10),LowerIdent(1:10-1:14),CloseStringInterpolation(1:14-1:15),StringPart(1:15-1:16),StringEnd(1:16-1:17),EndOfFile(1:17-1:17),
diff --git a/src/snapshots/expr/tag_vs_function_calls.md b/src/snapshots/expr/tag_vs_function_calls.md
index ed2d7ddc2b..3803f734a7 100644
--- a/src/snapshots/expr/tag_vs_function_calls.md
+++ b/src/snapshots/expr/tag_vs_function_calls.md
@@ -18,7 +18,7 @@ type=expr
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - tag_vs_function_calls.md:6:13:6:15
-expected_expr_close_curly_or_comma - tag_vs_function_calls.md:6:14:6:18
+PARSE ERROR - tag_vs_function_calls.md:6:14:6:18
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **\x** is not expected in an expression.
diff --git a/src/snapshots/expr/tuple_comprehensive.md b/src/snapshots/expr/tuple_comprehensive.md
index b510e4cf5f..e324ba35a3 100644
--- a/src/snapshots/expr/tuple_comprehensive.md
+++ b/src/snapshots/expr/tuple_comprehensive.md
@@ -26,7 +26,7 @@ type=expr
 }
 ~~~
 # EXPECTED
-empty_tuple - tuple_comprehensive.md:9:10:9:12
+EMPTY TUPLE NOT ALLOWED - tuple_comprehensive.md:9:10:9:12
 UNUSED VARIABLE - tuple_comprehensive.md:16:2:16:13
 UNUSED VARIABLE - tuple_comprehensive.md:10:2:10:8
 UNUSED VARIABLE - tuple_comprehensive.md:11:2:11:6
@@ -35,7 +35,100 @@ UNUSED VARIABLE - tuple_comprehensive.md:12:2:12:8
 UNUSED VARIABLE - tuple_comprehensive.md:14:2:14:7
 UNUSED VARIABLE - tuple_comprehensive.md:15:2:15:11
 # PROBLEMS
-NIL
+**EMPTY TUPLE NOT ALLOWED**
+I am part way through parsing this tuple, but it is empty:
+**tuple_comprehensive.md:9:10:9:12:**
+```roc
+	empty = ()
+```
+         ^^
+
+If you want to represent nothing, try using an empty record: `{}`.
+
+**UNUSED VARIABLE**
+Variable ``with_lambda`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_with_lambda` to suppress this warning.
+The unused variable is declared here:
+**tuple_comprehensive.md:16:2:16:13:**
+```roc
+	with_lambda = (|n| n + 1, 42)
+```
+ ^^^^^^^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``single`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_single` to suppress this warning.
+The unused variable is declared here:
+**tuple_comprehensive.md:10:2:10:8:**
+```roc
+	single = (42)
+```
+ ^^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``pair`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_pair` to suppress this warning.
+The unused variable is declared here:
+**tuple_comprehensive.md:11:2:11:6:**
+```roc
+	pair = (1, 2)
+```
+ ^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``nested`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_nested` to suppress this warning.
+The unused variable is declared here:
+**tuple_comprehensive.md:13:2:13:8:**
+```roc
+	nested = ((1, 2), (3, 4))
+```
+ ^^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``triple`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_triple` to suppress this warning.
+The unused variable is declared here:
+**tuple_comprehensive.md:12:2:12:8:**
+```roc
+	triple = (1, "hello", True)
+```
+ ^^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``mixed`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_mixed` to suppress this warning.
+The unused variable is declared here:
+**tuple_comprehensive.md:14:2:14:7:**
+```roc
+	mixed = (add_one(5), "world", [1, 2, 3])
+```
+ ^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``with_vars`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_with_vars` to suppress this warning.
+The unused variable is declared here:
+**tuple_comprehensive.md:15:2:15:11:**
+```roc
+	with_vars = (x, y, z)
+```
+ ^^^^^^^^^
+
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),Newline(1:1-1:1),
diff --git a/src/snapshots/expr/tuple_empty_unbound.md b/src/snapshots/expr/tuple_empty_unbound.md
index 8067d2389d..e8882fe6ba 100644
--- a/src/snapshots/expr/tuple_empty_unbound.md
+++ b/src/snapshots/expr/tuple_empty_unbound.md
@@ -8,9 +8,18 @@ type=expr
 ()
 ~~~
 # EXPECTED
-empty_tuple - tuple_empty_unbound.md:1:1:1:3
+EMPTY TUPLE NOT ALLOWED - tuple_empty_unbound.md:1:1:1:3
 # PROBLEMS
-NIL
+**EMPTY TUPLE NOT ALLOWED**
+I am part way through parsing this tuple, but it is empty:
+**tuple_empty_unbound.md:1:1:1:3:**
+```roc
+()
+```
+^^
+
+If you want to represent nothing, try using an empty record: `{}`.
+
 # TOKENS
 ~~~zig
 OpenRound(1:1-1:2),CloseRound(1:2-1:3),EndOfFile(1:3-1:3),
diff --git a/src/snapshots/expr/tuple_patterns.md b/src/snapshots/expr/tuple_patterns.md
index 9589782286..276c0cc47e 100644
--- a/src/snapshots/expr/tuple_patterns.md
+++ b/src/snapshots/expr/tuple_patterns.md
@@ -31,20 +31,6 @@ UNEXPECTED TOKEN IN EXPRESSION - tuple_patterns.md:7:22:7:25
 UNEXPECTED TOKEN IN EXPRESSION - tuple_patterns.md:10:28:10:31
 UNEXPECTED TOKEN IN EXPRESSION - tuple_patterns.md:13:29:13:32
 UNEXPECTED TOKEN IN EXPRESSION - tuple_patterns.md:16:19:16:22
-UNDEFINED VARIABLE - tuple_patterns.md:4:6:4:7
-UNDEFINED VARIABLE - tuple_patterns.md:4:9:4:10
-UNDEFINED VARIABLE - tuple_patterns.md:7:7:7:8
-UNDEFINED VARIABLE - tuple_patterns.md:7:10:7:11
-UNDEFINED VARIABLE - tuple_patterns.md:7:15:7:16
-UNDEFINED VARIABLE - tuple_patterns.md:7:18:7:19
-UNDEFINED VARIABLE - tuple_patterns.md:10:6:10:11
-UNDEFINED VARIABLE - tuple_patterns.md:10:13:10:19
-UNDEFINED VARIABLE - tuple_patterns.md:10:21:10:26
-UNDEFINED VARIABLE - tuple_patterns.md:13:6:13:10
-UNDEFINED VARIABLE - tuple_patterns.md:13:12:13:18
-UNDEFINED VARIABLE - tuple_patterns.md:13:20:13:27
-UNDEFINED VARIABLE - tuple_patterns.md:16:6:16:10
-UNDEFINED VARIABLE - tuple_patterns.md:16:12:16:17
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **= (** is not expected in an expression.
@@ -106,6 +92,62 @@ Here is the problematic code:
                   ^^^
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `y` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `a` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `b` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `c` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `d` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `first` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `second` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `third` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `name` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `string` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `boolean` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `list` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `hello` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),Newline(1:1-1:1),
diff --git a/src/snapshots/expr/unknown_operator.md b/src/snapshots/expr/unknown_operator.md
index e341ce50a1..808cf61230 100644
--- a/src/snapshots/expr/unknown_operator.md
+++ b/src/snapshots/expr/unknown_operator.md
@@ -9,7 +9,6 @@ type=expr
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - unknown_operator.md:1:4:1:7
-expr_not_canonicalized - unknown_operator.md:1:1:1:7
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **+ 2** is not expected in an expression.
@@ -23,6 +22,10 @@ Here is the problematic code:
    ^^^
 
 
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
 # TOKENS
 ~~~zig
 Int(1:1-1:2),OpPlus(1:3-1:4),OpPlus(1:4-1:5),Int(1:6-1:7),EndOfFile(1:7-1:7),
diff --git a/src/snapshots/expr/when_simple.md b/src/snapshots/expr/when_simple.md
index c4bc8c6af5..691bedfdab 100644
--- a/src/snapshots/expr/when_simple.md
+++ b/src/snapshots/expr/when_simple.md
@@ -10,9 +10,12 @@ when x is
     Err(msg) -> msg
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - when_simple.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),LowerIdent(1:6-1:7),LowerIdent(1:8-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/expr_ident_simple.md b/src/snapshots/expr_ident_simple.md
index 7d2e9806c2..60e52144d1 100644
--- a/src/snapshots/expr_ident_simple.md
+++ b/src/snapshots/expr_ident_simple.md
@@ -8,9 +8,12 @@ type=expr
 foo
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - expr_ident_simple.md:1:1:1:4
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `foo` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:4),EndOfFile(1:4-1:4),
diff --git a/src/snapshots/expr_if_missing_else.md b/src/snapshots/expr_if_missing_else.md
index 076e7bf32f..940a3255e3 100644
--- a/src/snapshots/expr_if_missing_else.md
+++ b/src/snapshots/expr_if_missing_else.md
@@ -10,8 +10,7 @@ module []
 foo = if tru then 0
 ~~~
 # EXPECTED
-no_else - expr_if_missing_else.md:3:19:3:20
-expr_not_canonicalized - expr_if_missing_else.md:3:19:3:20
+PARSE ERROR - expr_if_missing_else.md:3:19:3:20
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `no_else`
@@ -25,6 +24,10 @@ foo = if tru then 0
                   ^
 
 
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
 # TOKENS
 ~~~zig
 KwModule(1:1-1:7),OpenSquare(1:8-1:9),CloseSquare(1:9-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/expr_int_invalid.md b/src/snapshots/expr_int_invalid.md
index eab601f862..3ea0369130 100644
--- a/src/snapshots/expr_int_invalid.md
+++ b/src/snapshots/expr_int_invalid.md
@@ -8,9 +8,11 @@ type=expr
 99999999999999999999999999999999999999999
 ~~~
 # EXPECTED
-invalid_num_literal - expr_int_invalid.md:1:1:1:42
-# PROBLEMS
 NIL
+# PROBLEMS
+**INVALID NUMBER**
+This number literal is not valid: 99999999999999999999999999999999999999999
+
 # TOKENS
 ~~~zig
 Int(1:1-1:42),EndOfFile(1:42-1:42),
diff --git a/src/snapshots/expr_no_space_dot_int.md b/src/snapshots/expr_no_space_dot_int.md
index 3b3cf440b2..5f032c7999 100644
--- a/src/snapshots/expr_no_space_dot_int.md
+++ b/src/snapshots/expr_no_space_dot_int.md
@@ -10,8 +10,7 @@ module []
 foo = asd.0
 ~~~
 # EXPECTED
-expr_no_space_dot_int - expr_no_space_dot_int.md:3:10:3:12
-expr_not_canonicalized - expr_no_space_dot_int.md:3:10:3:12
+PARSE ERROR - expr_no_space_dot_int.md:3:10:3:12
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `expr_no_space_dot_int`
@@ -25,6 +24,10 @@ foo = asd.0
          ^^
 
 
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
 # TOKENS
 ~~~zig
 KwModule(1:1-1:7),OpenSquare(1:8-1:9),CloseSquare(1:9-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/external_lookup_expr.md b/src/snapshots/external_lookup_expr.md
index 952dcd24c6..7ae43203f7 100644
--- a/src/snapshots/external_lookup_expr.md
+++ b/src/snapshots/external_lookup_expr.md
@@ -8,9 +8,12 @@ type=expr
 Json.utf8
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - external_lookup_expr.md:1:1:1:10
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `utf8` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 UpperIdent(1:1-1:5),NoSpaceDotLowerIdent(1:5-1:10),EndOfFile(1:10-1:10),
diff --git a/src/snapshots/fuzz_crash/fuzz_crash_001.md b/src/snapshots/fuzz_crash/fuzz_crash_001.md
index 20d5c625b0..4230950fae 100644
--- a/src/snapshots/fuzz_crash/fuzz_crash_001.md
+++ b/src/snapshots/fuzz_crash/fuzz_crash_001.md
@@ -8,9 +8,9 @@ type=file
 mo|%
 ~~~
 # EXPECTED
-missing_header - fuzz_crash_001.md:1:1:1:4
+MISSING HEADER - fuzz_crash_001.md:1:1:1:4
 UNEXPECTED TOKEN IN PATTERN - fuzz_crash_001.md:1:4:1:5
-expected_expr_bar - fuzz_crash_001.md:1:5:1:5
+PARSE ERROR - fuzz_crash_001.md:1:5:1:5
 # PROBLEMS
 **MISSING HEADER**
 Roc files must start with a module header.
@@ -52,6 +52,10 @@ mo|%
     
 
 
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:3),OpBar(1:3-1:4),OpPercent(1:4-1:5),EndOfFile(1:5-1:5),
diff --git a/src/snapshots/fuzz_crash/fuzz_crash_002.md b/src/snapshots/fuzz_crash/fuzz_crash_002.md
index 906fbfbabb..01b92fda7b 100644
--- a/src/snapshots/fuzz_crash/fuzz_crash_002.md
+++ b/src/snapshots/fuzz_crash/fuzz_crash_002.md
@@ -8,7 +8,7 @@ type=file
 modu:;::::::::::::::le[%
 ~~~
 # EXPECTED
-missing_header - fuzz_crash_002.md:1:1:1:6
+MISSING HEADER - fuzz_crash_002.md:1:1:1:6
 UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_002.md:1:5:1:7
 UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_002.md:1:6:1:8
 UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_002.md:1:7:1:9
@@ -26,7 +26,7 @@ UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_002.md:1:18:1:20
 UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_002.md:1:19:1:21
 UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_002.md:1:20:1:23
 UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_002.md:1:24:1:25
-expected_expr_close_square_or_comma - fuzz_crash_002.md:1:25:1:25
+LIST NOT CLOSED - fuzz_crash_002.md:1:25:1:25
 # PROBLEMS
 **MISSING HEADER**
 Roc files must start with a module header.
@@ -261,6 +261,78 @@ modu:;::::::::::::::le[%
                         
 
 
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),OpColon(1:5-1:6),MalformedUnknownToken(1:6-1:7),OpColon(1:7-1:8),OpColon(1:8-1:9),OpColon(1:9-1:10),OpColon(1:10-1:11),OpColon(1:11-1:12),OpColon(1:12-1:13),OpColon(1:13-1:14),OpColon(1:14-1:15),OpColon(1:15-1:16),OpColon(1:16-1:17),OpColon(1:17-1:18),OpColon(1:18-1:19),OpColon(1:19-1:20),OpColon(1:20-1:21),LowerIdent(1:21-1:23),OpenSquare(1:23-1:24),OpPercent(1:24-1:25),EndOfFile(1:25-1:25),
diff --git a/src/snapshots/fuzz_crash/fuzz_crash_003.md b/src/snapshots/fuzz_crash/fuzz_crash_003.md
index e69ef74155..c60ff76626 100644
--- a/src/snapshots/fuzz_crash/fuzz_crash_003.md
+++ b/src/snapshots/fuzz_crash/fuzz_crash_003.md
@@ -8,8 +8,7 @@ type=file
 = "te
 ~~~
 # EXPECTED
-UnclosedString - fuzz_crash_003.md:1:4:1:6
-missing_header - fuzz_crash_003.md:1:1:1:4
+UNCLOSED STRING - fuzz_crash_003.md:1:1:1:4
 # PROBLEMS
 **UNCLOSED STRING**
 This string is missing a closing quote.
@@ -30,6 +29,10 @@ Here is the problematic code:
 ^^^
 
 
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 # TOKENS
 ~~~zig
 OpAssign(1:1-1:2),StringStart(1:3-1:4),StringPart(1:4-1:6),EndOfFile(1:6-1:6),
diff --git a/src/snapshots/fuzz_crash/fuzz_crash_004.md b/src/snapshots/fuzz_crash/fuzz_crash_004.md
index d332ca2393..a45d6f8cad 100644
--- a/src/snapshots/fuzz_crash/fuzz_crash_004.md
+++ b/src/snapshots/fuzz_crash/fuzz_crash_004.md
@@ -8,7 +8,7 @@ type=file
 F
 ~~~
 # EXPECTED
-missing_header - fuzz_crash_004.md:1:1:1:2
+MISSING HEADER - fuzz_crash_004.md:1:1:1:2
 # PROBLEMS
 **MISSING HEADER**
 Roc files must start with a module header.
diff --git a/src/snapshots/fuzz_crash/fuzz_crash_005.md b/src/snapshots/fuzz_crash/fuzz_crash_005.md
index 975ddb8999..717ae24069 100644
--- a/src/snapshots/fuzz_crash/fuzz_crash_005.md
+++ b/src/snapshots/fuzz_crash/fuzz_crash_005.md
@@ -8,7 +8,7 @@ type=file
 modu
 ~~~
 # EXPECTED
-missing_header - fuzz_crash_005.md:1:1:1:5
+MISSING HEADER - fuzz_crash_005.md:1:1:1:5
 # PROBLEMS
 **MISSING HEADER**
 Roc files must start with a module header.
diff --git a/src/snapshots/fuzz_crash/fuzz_crash_006.md b/src/snapshots/fuzz_crash/fuzz_crash_006.md
index 19435aa84e..01cf997de8 100644
Binary files a/src/snapshots/fuzz_crash/fuzz_crash_006.md and b/src/snapshots/fuzz_crash/fuzz_crash_006.md differ
diff --git a/src/snapshots/fuzz_crash/fuzz_crash_007.md b/src/snapshots/fuzz_crash/fuzz_crash_007.md
index cbe0c6b952..7c0f94c698 100644
--- a/src/snapshots/fuzz_crash/fuzz_crash_007.md
+++ b/src/snapshots/fuzz_crash/fuzz_crash_007.md
@@ -8,7 +8,7 @@ type=file
 ff8.8.d
 ~~~
 # EXPECTED
-missing_header - fuzz_crash_007.md:1:1:1:6
+MISSING HEADER - fuzz_crash_007.md:1:1:1:6
 UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_007.md:1:4:1:8
 UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_007.md:1:6:1:8
 # PROBLEMS
@@ -52,6 +52,14 @@ ff8.8.d
      ^^
 
 
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:4),NoSpaceDotInt(1:4-1:6),NoSpaceDotLowerIdent(1:6-1:8),EndOfFile(1:8-1:8),
diff --git a/src/snapshots/fuzz_crash/fuzz_crash_008.md b/src/snapshots/fuzz_crash/fuzz_crash_008.md
index d4d85f61c1..4ae970949e 100644
--- a/src/snapshots/fuzz_crash/fuzz_crash_008.md
+++ b/src/snapshots/fuzz_crash/fuzz_crash_008.md
@@ -8,9 +8,8 @@ type=file
 ||1
 ~~~
 # EXPECTED
-AsciiControl - fuzz_crash_008.md:1:2:1:2
-missing_header - fuzz_crash_008.md:1:1:1:4
-expected_expr_bar - fuzz_crash_008.md:1:5:1:5
+ASCII CONTROL CHARACTER - fuzz_crash_008.md:1:1:1:4
+PARSE ERROR - fuzz_crash_008.md:1:5:1:5
 # PROBLEMS
 **ASCII CONTROL CHARACTER**
 ASCII control characters are not allowed in Roc source code.
@@ -43,6 +42,10 @@ Here is the problematic code:
     
 
 
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 # TOKENS
 ~~~zig
 OpBar(1:1-1:2),OpBar(1:3-1:4),Int(1:4-1:5),EndOfFile(1:5-1:5),
diff --git a/src/snapshots/fuzz_crash/fuzz_crash_009.md b/src/snapshots/fuzz_crash/fuzz_crash_009.md
index a84a497877..73e3663ddf 100644
--- a/src/snapshots/fuzz_crash/fuzz_crash_009.md
+++ b/src/snapshots/fuzz_crash/fuzz_crash_009.md
@@ -13,9 +13,7 @@ foo =
     "onmo %
 ~~~
 # EXPECTED
-MismatchedBrace - fuzz_crash_009.md:2:6:2:6
-UnclosedString - fuzz_crash_009.md:6:6:6:12
-missing_header - fuzz_crash_009.md:1:2:1:4
+MISMATCHED BRACE - fuzz_crash_009.md:1:2:1:4
 # PROBLEMS
 **MISMATCHED BRACE**
 This brace does not match the corresponding opening brace.
@@ -39,6 +37,10 @@ Here is the problematic code:
  ^^
 
 
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 # TOKENS
 ~~~zig
 LowerIdent(1:2-1:3),OpenCurly(1:3-1:4),LowerIdent(1:4-1:5),Comma(1:5-1:6),Newline(1:1-1:1),
diff --git a/src/snapshots/fuzz_crash/fuzz_crash_010.md b/src/snapshots/fuzz_crash/fuzz_crash_010.md
index f6ed404021..2ebc3f29f4 100644
--- a/src/snapshots/fuzz_crash/fuzz_crash_010.md
+++ b/src/snapshots/fuzz_crash/fuzz_crash_010.md
@@ -12,10 +12,7 @@ foo =
     "on        (string 'onmo %')))
 ~~~
 # EXPECTED
-AsciiControl - fuzz_crash_010.md:2:3:2:3
-MismatchedBrace - fuzz_crash_010.md:2:6:2:6
-UnclosedString - fuzz_crash_010.md:5:6:5:35
-missing_header - fuzz_crash_010.md:1:1:1:3
+ASCII CONTROL CHARACTER - fuzz_crash_010.md:1:1:1:3
 # PROBLEMS
 **ASCII CONTROL CHARACTER**
 ASCII control characters are not allowed in Roc source code.
@@ -42,6 +39,10 @@ H{o,
 ^^
 
 
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 # TOKENS
 ~~~zig
 UpperIdent(1:1-1:2),OpenCurly(1:2-1:3),LowerIdent(1:3-1:4),Comma(1:4-1:5),Newline(1:1-1:1),
diff --git a/src/snapshots/fuzz_crash/fuzz_crash_011.md b/src/snapshots/fuzz_crash/fuzz_crash_011.md
index e65e712485..d545137b39 100644
--- a/src/snapshots/fuzz_crash/fuzz_crash_011.md
+++ b/src/snapshots/fuzz_crash/fuzz_crash_011.md
@@ -8,9 +8,8 @@ type=file
 module P]F
 ~~~
 # EXPECTED
-OverClosedBrace - fuzz_crash_011.md:1:9:1:9
-header_expected_open_square - fuzz_crash_011.md:1:8:1:11
-expected_colon_after_type_annotation - fuzz_crash_011.md:1:11:1:11
+OVER CLOSED BRACE - fuzz_crash_011.md:1:8:1:11
+PARSE ERROR - fuzz_crash_011.md:1:11:1:11
 # PROBLEMS
 **OVER CLOSED BRACE**
 There are too many closing braces here.
diff --git a/src/snapshots/fuzz_crash/fuzz_crash_012.md b/src/snapshots/fuzz_crash/fuzz_crash_012.md
index f4bacef16f..3bbdca11d7 100644
--- a/src/snapshots/fuzz_crash/fuzz_crash_012.md
+++ b/src/snapshots/fuzz_crash/fuzz_crash_012.md
@@ -8,10 +8,10 @@ type=file
 ||(|(l888888888|
 ~~~
 # EXPECTED
-missing_header - fuzz_crash_012.md:1:1:1:3
+MISSING HEADER - fuzz_crash_012.md:1:1:1:3
 UNEXPECTED TOKEN IN PATTERN - fuzz_crash_012.md:1:4:1:6
 UNEXPECTED TOKEN IN PATTERN - fuzz_crash_012.md:1:3:1:5
-expected_expr_bar - fuzz_crash_012.md:1:17:1:17
+PARSE ERROR - fuzz_crash_012.md:1:17:1:17
 # PROBLEMS
 **MISSING HEADER**
 Roc files must start with a module header.
@@ -65,6 +65,10 @@ Here is the problematic code:
                 
 
 
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 # TOKENS
 ~~~zig
 OpBar(1:1-1:2),OpBar(1:2-1:3),NoSpaceOpenRound(1:3-1:4),OpBar(1:4-1:5),NoSpaceOpenRound(1:5-1:6),LowerIdent(1:6-1:16),OpBar(1:16-1:17),EndOfFile(1:17-1:17),
diff --git a/src/snapshots/fuzz_crash/fuzz_crash_013.md b/src/snapshots/fuzz_crash/fuzz_crash_013.md
index f89e3185a5..582ef42158 100644
--- a/src/snapshots/fuzz_crash/fuzz_crash_013.md
+++ b/src/snapshots/fuzz_crash/fuzz_crash_013.md
@@ -8,7 +8,7 @@ type=file
 0{
 ~~~
 # EXPECTED
-missing_header - fuzz_crash_013.md:1:1:1:3
+MISSING HEADER - fuzz_crash_013.md:1:1:1:3
 # PROBLEMS
 **MISSING HEADER**
 Roc files must start with a module header.
@@ -26,6 +26,10 @@ Here is the problematic code:
 ^^
 
 
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 # TOKENS
 ~~~zig
 Int(1:1-1:2),OpenCurly(1:2-1:3),EndOfFile(1:3-1:3),
diff --git a/src/snapshots/fuzz_crash/fuzz_crash_014.md b/src/snapshots/fuzz_crash/fuzz_crash_014.md
index aa6d7dbe04..cf7047a8a7 100644
--- a/src/snapshots/fuzz_crash/fuzz_crash_014.md
+++ b/src/snapshots/fuzz_crash/fuzz_crash_014.md
@@ -10,7 +10,9 @@ type=file
 0u22
 ~~~
 # EXPECTED
-missing_header - fuzz_crash_014.md:1:1:1:5
+MISSING HEADER - fuzz_crash_014.md:1:1:1:5
+UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_014.md:1:3:1:3
+UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_014.md:2:1:2:1
 UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_014.md:3:1:3:5
 # PROBLEMS
 **MISSING HEADER**
@@ -65,6 +67,18 @@ Here is the problematic code:
 ^^^^
 
 
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 # TOKENS
 ~~~zig
 MalformedNumberNoDigits(1:1-1:3),NoSpaceDotInt(1:3-1:5),Newline(1:1-1:1),
diff --git a/src/snapshots/fuzz_crash/fuzz_crash_015.md b/src/snapshots/fuzz_crash/fuzz_crash_015.md
index 74eb9ebdab..90b38a6af2 100644
--- a/src/snapshots/fuzz_crash/fuzz_crash_015.md
+++ b/src/snapshots/fuzz_crash/fuzz_crash_015.md
@@ -11,8 +11,9 @@ type=file
 0_
 ~~~
 # EXPECTED
-LeadingZero - fuzz_crash_015.md:2:3:2:3
-missing_header - fuzz_crash_015.md:1:1:1:6
+LEADING ZERO - fuzz_crash_015.md:1:1:1:6
+UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_015.md:1:4:1:4
+PARSE ERROR - fuzz_crash_015.md:3:4:3:4
 # PROBLEMS
 **LEADING ZERO**
 Numbers cannot have leading zeros.
@@ -57,6 +58,22 @@ Here is the problematic code:
    
 
 
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 # TOKENS
 ~~~zig
 Int(1:1-1:4),NoSpaceDotInt(1:4-1:6),Newline(1:1-1:1),
diff --git a/src/snapshots/fuzz_crash/fuzz_crash_016.md b/src/snapshots/fuzz_crash/fuzz_crash_016.md
index d4741ad0ac..c359334fdd 100644
--- a/src/snapshots/fuzz_crash/fuzz_crash_016.md
+++ b/src/snapshots/fuzz_crash/fuzz_crash_016.md
@@ -8,8 +8,8 @@ type=file
 0|
 ~~~
 # EXPECTED
-missing_header - fuzz_crash_016.md:1:1:1:3
-expected_expr_bar - fuzz_crash_016.md:1:3:1:3
+MISSING HEADER - fuzz_crash_016.md:1:1:1:3
+PARSE ERROR - fuzz_crash_016.md:1:3:1:3
 # PROBLEMS
 **MISSING HEADER**
 Roc files must start with a module header.
@@ -39,6 +39,10 @@ Here is the problematic code:
   
 
 
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 # TOKENS
 ~~~zig
 Int(1:1-1:2),OpBar(1:2-1:3),EndOfFile(1:3-1:3),
diff --git a/src/snapshots/fuzz_crash/fuzz_crash_017.md b/src/snapshots/fuzz_crash/fuzz_crash_017.md
index 3d50f45ae2..b422564678 100644
--- a/src/snapshots/fuzz_crash/fuzz_crash_017.md
+++ b/src/snapshots/fuzz_crash/fuzz_crash_017.md
@@ -9,10 +9,9 @@ me = "luc"
 foo = "hello ${namF
 ~~~
 # EXPECTED
-missing_header - fuzz_crash_017.md:1:1:1:5
+MISSING HEADER - fuzz_crash_017.md:1:1:1:5
 UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_017.md:1:4:1:7
-string_expected_close_interpolation - fuzz_crash_017.md:2:7:2:14
-expr_not_canonicalized - fuzz_crash_017.md:2:7:2:20
+PARSE ERROR - fuzz_crash_017.md:2:7:2:14
 # PROBLEMS
 **MISSING HEADER**
 Roc files must start with a module header.
@@ -54,6 +53,18 @@ foo = "hello ${namF
       ^^^^^^^
 
 
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:3),OpAssign(1:4-1:5),StringStart(1:6-1:7),StringPart(1:7-1:10),StringEnd(1:10-1:11),Newline(1:1-1:1),
diff --git a/src/snapshots/fuzz_crash/fuzz_crash_018.md b/src/snapshots/fuzz_crash/fuzz_crash_018.md
index 24f8db8135..d2a3aa5c78 100644
--- a/src/snapshots/fuzz_crash/fuzz_crash_018.md
+++ b/src/snapshots/fuzz_crash/fuzz_crash_018.md
@@ -9,7 +9,7 @@ type=file
 .R
 ~~~
 # EXPECTED
-missing_header - fuzz_crash_018.md:1:1:1:4
+MISSING HEADER - fuzz_crash_018.md:1:1:1:4
 UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_018.md:2:1:2:3
 UNDECLARED TYPE - fuzz_crash_018.md:1:5:1:6
 # PROBLEMS
@@ -41,6 +41,21 @@ Here is the problematic code:
 ^^
 
 
+**UNDECLARED TYPE**
+The type ``S`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_018.md:1:5:1:6:**
+```roc
+0 b:S
+```
+    ^
+
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 # TOKENS
 ~~~zig
 Int(1:1-1:2),LowerIdent(1:3-1:4),OpColon(1:4-1:5),UpperIdent(1:5-1:6),Newline(1:1-1:1),
diff --git a/src/snapshots/fuzz_crash/fuzz_crash_019.md b/src/snapshots/fuzz_crash/fuzz_crash_019.md
index c4d4df677b..cd6635a86b 100644
--- a/src/snapshots/fuzz_crash/fuzz_crash_019.md
+++ b/src/snapshots/fuzz_crash/fuzz_crash_019.md
@@ -129,54 +129,361 @@ h == foo
 ~~~
 # EXPECTED
 UNDECLARED TYPE - fuzz_crash_019.md:13:13:13:16
-undeclared_type_var - fuzz_crash_019.md:13:19:13:21
-undeclared_type_var - fuzz_crash_019.md:19:4:19:6
-undeclared_type_var - fuzz_crash_019.md:20:12:20:13
+UNDECLARED TYPE VARIABLE - fuzz_crash_019.md:13:19:13:21
+UNDECLARED TYPE VARIABLE - fuzz_crash_019.md:19:4:19:6
+UNDECLARED TYPE VARIABLE - fuzz_crash_019.md:20:12:20:13
 UNDECLARED TYPE - fuzz_crash_019.md:24:15:24:16
-undeclared_type_var - fuzz_crash_019.md:24:24:24:25
+UNDECLARED TYPE VARIABLE - fuzz_crash_019.md:24:24:24:25
 UNDECLARED TYPE - fuzz_crash_019.md:37:7:37:9
-not_implemented - fuzz_crash_019.md:1:1:1:1
-UNDEFINED VARIABLE - fuzz_crash_019.md:42:6:42:10
-not_implemented - fuzz_crash_019.md:1:1:1:1
-UNDEFINED VARIABLE - fuzz_crash_019.md:45:3:45:4
-UNDEFINED VARIABLE - fuzz_crash_019.md:53:2:53:3
-UNUSED VARIABLE - fuzz_crash_019.md:52:11:52:14
-UNDEFINED VARIABLE - fuzz_crash_019.md:55:11:55:12
-UNUSED VARIABLE - fuzz_crash_019.md:57:2:57:4
-UNDEFINED VARIABLE - fuzz_crash_019.md:59:3:59:7
-UNUSED VARIABLE - fuzz_crash_019.md:60:12:60:15
-not_implemented - fuzz_crash_019.md:1:1:1:1
-not_implemented - fuzz_crash_019.md:1:1:1:1
-UNDECLARED TYPE - fuzz_crash_019.md:74:9:74:15
-UNDEFINED VARIABLE - fuzz_crash_019.md:75:11:75:12
-not_implemented - fuzz_crash_019.md:1:1:1:1
-not_implemented - fuzz_crash_019.md:1:1:1:1
-not_implemented - fuzz_crash_019.md:83:2:83:5
-not_implemented - fuzz_crash_019.md:85:3:85:6
-not_implemented - fuzz_crash_019.md:86:3:86:12
-UNDEFINED VARIABLE - fuzz_crash_019.md:87:11:87:12
-UNDEFINED VARIABLE - fuzz_crash_019.md:89:3:89:6
-not_implemented - fuzz_crash_019.md:1:1:1:1
-UNDEFINED VARIABLE - fuzz_crash_019.md:96:34:96:37
-UNDEFINED VARIABLE - fuzz_crash_019.md:96:47:96:52
-UNDEFINED VARIABLE - fuzz_crash_019.md:96:54:96:59
-UNDEFINED VARIABLE - fuzz_crash_019.md:97:21:97:24
-UNDEFINED VARIABLE - fuzz_crash_019.md:97:30:97:32
-UNDEFINED VARIABLE - fuzz_crash_019.md:98:2:98:3
-UNDEFINED VARIABLE - fuzz_crash_019.md:100:11:100:14
-UNDEFINED VARIABLE - fuzz_crash_019.md:102:4:102:6
-UNDEFINED VARIABLE - fuzz_crash_019.md:102:8:102:13
-UNDEFINED VARIABLE - fuzz_crash_019.md:105:2:105:3
-not_implemented - fuzz_crash_019.md:1:1:1:1
-UNDEFINED VARIABLE - fuzz_crash_019.md:108:4:108:5
-UNDEFINED VARIABLE - fuzz_crash_019.md:108:6:108:8
-UNUSED VARIABLE - fuzz_crash_019.md:87:2:87:3
+NOT IMPLEMENTED - fuzz_crash_019.md:52:11:52:14
+UNDEFINED VARIABLE - fuzz_crash_019.md:57:2:57:4
+UNDEFINED VARIABLE - fuzz_crash_019.md:60:12:60:15
+NOT IMPLEMENTED - fuzz_crash_019.md:74:9:74:15
+UNDEFINED VARIABLE - fuzz_crash_019.md:97:2:97:3
+fuzz_crash_019.md:88:1:88:2: - fuzz_crash_019.md:87:2:87:3
 UNUSED VARIABLE - fuzz_crash_019.md:76:2:76:3
 UNUSED VARIABLE - fuzz_crash_019.md:88:1:88:2
 UNUSED VARIABLE - fuzz_crash_019.md:96:2:96:4
 UNDECLARED TYPE - fuzz_crash_019.md:116:5:116:6
-not_implemented - fuzz_crash_019.md:1:1:1:1
+NOT IMPLEMENTED - fuzz_crash_019.md:84:2:84:4
 # PROBLEMS
+**UNDECLARED TYPE**
+The type ``Lis`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_019.md:13:13:13:16:**
+```roc
+Map(a, b) : Lis, (ab) -> List(b)
+```
+            ^^^
+
+
+**UNDECLARED TYPE VARIABLE**
+The type variable ``ab`` is not declared in this scope.
+
+Type variables must be introduced in a type annotation before they can be used.
+
+This type variable is referenced here:
+**fuzz_crash_019.md:13:19:13:21:**
+```roc
+Map(a, b) : Lis, (ab) -> List(b)
+```
+                  ^^
+
+
+**UNDECLARED TYPE VARIABLE**
+The type variable ``ab`` is not declared in this scope.
+
+Type variables must be introduced in a type annotation before they can be used.
+
+This type variable is referenced here:
+**fuzz_crash_019.md:19:4:19:6:**
+```roc
+		(ab) -> # row
+```
+   ^^
+
+
+**UNDECLARED TYPE VARIABLE**
+The type variable ``b`` is not declared in this scope.
+
+Type variables must be introduced in a type annotation before they can be used.
+
+This type variable is referenced here:
+**fuzz_crash_019.md:20:12:20:13:**
+```roc
+			List(			b	) #z)
+```
+           ^
+
+
+**UNDECLARED TYPE**
+The type ``O`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_019.md:24:15:24:16:**
+```roc
+Som : { foo : O, bar : g }
+```
+              ^
+
+
+**UNDECLARED TYPE VARIABLE**
+The type variable ``g`` is not declared in this scope.
+
+Type variables must be introduced in a type annotation before they can be used.
+
+This type variable is referenced here:
+**fuzz_crash_019.md:24:24:24:25:**
+```roc
+Som : { foo : O, bar : g }
+```
+                       ^
+
+
+**UNDECLARED TYPE**
+The type ``U6`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_019.md:37:7:37:9:**
+```roc
+one : U6
+```
+      ^^
+
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize dbg expression
+Let us know if you want to help!
+
+**UNDEFINED VARIABLE**
+Nothing is named `exp0` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize dbg expression
+Let us know if you want to help!
+
+**UNDEFINED VARIABLE**
+Nothing is named `r` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNUSED VARIABLE**
+Variable ``lue`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_lue` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_019.md:52:11:52:14:**
+```roc
+	match a {lue  {
+```
+          ^^^
+
+
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNUSED VARIABLE**
+Variable ``er`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_er` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_019.md:57:2:57:4:**
+```roc
+	er #ent
+```
+ ^^
+
+
+**UNDEFINED VARIABLE**
+Nothing is named `ment` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNUSED VARIABLE**
+Variable ``est`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_est` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_019.md:60:12:60:15:**
+```roc
+		[1, 2, 3,est]123
+```
+           ^^^
+
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize alternatives pattern
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: top-level expect
+Let us know if you want to help!
+
+**UNDECLARED TYPE**
+The type ``Listlt`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_019.md:74:9:74:15:**
+```roc
+main! : Listlt({}, _)
+```
+        ^^^^^^
+
+
+**UNDEFINED VARIABLE**
+Nothing is named `e` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: statement type in block
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: statement type in block
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: ...
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: ...
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: crash statement
+Let us know if you want to help!
+
+**UNDEFINED VARIABLE**
+Nothing is named `d` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `one` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: statement type in block
+Let us know if you want to help!
+
+**UNDEFINED VARIABLE**
+Nothing is named `tag` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `world` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `ned` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**DUPLICATE DEFINITION**
+The name `t` is being redeclared in this scope.
+
+The redeclaration is here:
+**fuzz_crash_019.md:97:2:97:3:**
+```roc
+	t = (123, "World", tag, O, (nd, t), [1, 2, 3])
+```
+ ^
+
+But `t` was already defined here:
+**fuzz_crash_019.md:88:1:88:2:**
+```roc
+t = [
+```
+^
+
+
+**UNDEFINED VARIABLE**
+Nothing is named `tag` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `nd` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `m` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `ag1` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `ne` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `tuple` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `b` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize suffix_single_question expression
+Let us know if you want to help!
+
+**UNDEFINED VARIABLE**
+Nothing is named `r` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `nu` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNUSED VARIABLE**
+Variable ``i`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_i` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_019.md:87:2:87:3:**
+```roc
+	i= "H, ${d}"
+```
+ ^
+
+
+**UNUSED VARIABLE**
+Variable ``w`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_w` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_019.md:76:2:76:3:**
+```roc
+	w = "d"
+```
+ ^
+
+
+**UNUSED VARIABLE**
+Variable ``t`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_t` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_019.md:88:1:88:2:**
+```roc
+t = [
+```
+^
+
+
+**UNUSED VARIABLE**
+Variable ``rd`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_rd` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_019.md:96:2:96:4:**
+```roc
+	rd = { foo: 123, bar: "H", baz: tag, qux: Ok(world),ned }
+```
+ ^^
+
+
+**UNDECLARED TYPE**
+The type ``V`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_019.md:116:5:116:6:**
+```roc
+t : V((a,c))
+```
+    ^
+
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: top-level expect
+Let us know if you want to help!
+
 **INCOMPATIBLE MATCH PATTERNS**
 The pattern in the fourth branch of this `match` differs from previous ones:
 **fuzz_crash_019.md:52:2:**
diff --git a/src/snapshots/fuzz_crash/fuzz_crash_020.md b/src/snapshots/fuzz_crash/fuzz_crash_020.md
index d165fe962e..d983336015 100644
--- a/src/snapshots/fuzz_crash/fuzz_crash_020.md
+++ b/src/snapshots/fuzz_crash/fuzz_crash_020.md
@@ -129,55 +129,364 @@ h == foo
 ~~~
 # EXPECTED
 UNDECLARED TYPE - fuzz_crash_020.md:13:13:13:16
-undeclared_type_var - fuzz_crash_020.md:13:19:13:21
-undeclared_type_var - fuzz_crash_020.md:19:4:19:6
-undeclared_type_var - fuzz_crash_020.md:20:12:20:13
+UNDECLARED TYPE VARIABLE - fuzz_crash_020.md:13:19:13:21
+UNDECLARED TYPE VARIABLE - fuzz_crash_020.md:19:4:19:6
+UNDECLARED TYPE VARIABLE - fuzz_crash_020.md:20:12:20:13
 UNDECLARED TYPE - fuzz_crash_020.md:24:15:24:16
-undeclared_type_var - fuzz_crash_020.md:24:24:24:25
+UNDECLARED TYPE VARIABLE - fuzz_crash_020.md:24:24:24:25
 UNDECLARED TYPE - fuzz_crash_020.md:37:7:37:9
-UNDEFINED VARIABLE - fuzz_crash_020.md:40:5:40:8
-not_implemented - fuzz_crash_020.md:1:1:1:1
-UNDEFINED VARIABLE - fuzz_crash_020.md:42:6:42:10
-not_implemented - fuzz_crash_020.md:1:1:1:1
-UNDEFINED VARIABLE - fuzz_crash_020.md:45:3:45:4
-UNDEFINED VARIABLE - fuzz_crash_020.md:53:2:53:3
-UNUSED VARIABLE - fuzz_crash_020.md:52:11:52:14
-UNDEFINED VARIABLE - fuzz_crash_020.md:55:11:55:12
-UNUSED VARIABLE - fuzz_crash_020.md:57:2:57:4
-UNDEFINED VARIABLE - fuzz_crash_020.md:59:3:59:7
-UNUSED VARIABLE - fuzz_crash_020.md:60:12:60:15
-not_implemented - fuzz_crash_020.md:1:1:1:1
-not_implemented - fuzz_crash_020.md:1:1:1:1
-UNDECLARED TYPE - fuzz_crash_020.md:74:9:74:15
-UNDEFINED VARIABLE - fuzz_crash_020.md:75:11:75:12
-not_implemented - fuzz_crash_020.md:1:1:1:1
-not_implemented - fuzz_crash_020.md:1:1:1:1
-not_implemented - fuzz_crash_020.md:83:2:83:5
-not_implemented - fuzz_crash_020.md:85:3:85:6
-not_implemented - fuzz_crash_020.md:86:3:86:12
-UNDEFINED VARIABLE - fuzz_crash_020.md:87:11:87:12
-UNDEFINED VARIABLE - fuzz_crash_020.md:89:3:89:6
-not_implemented - fuzz_crash_020.md:1:1:1:1
-UNDEFINED VARIABLE - fuzz_crash_020.md:96:34:96:37
-UNDEFINED VARIABLE - fuzz_crash_020.md:96:47:96:52
-UNDEFINED VARIABLE - fuzz_crash_020.md:96:54:96:59
-UNDEFINED VARIABLE - fuzz_crash_020.md:97:21:97:24
-UNDEFINED VARIABLE - fuzz_crash_020.md:97:30:97:32
-UNDEFINED VARIABLE - fuzz_crash_020.md:98:2:98:3
-UNDEFINED VARIABLE - fuzz_crash_020.md:100:11:100:14
-UNDEFINED VARIABLE - fuzz_crash_020.md:102:4:102:6
-UNDEFINED VARIABLE - fuzz_crash_020.md:102:8:102:13
-UNDEFINED VARIABLE - fuzz_crash_020.md:105:2:105:3
-not_implemented - fuzz_crash_020.md:1:1:1:1
-UNDEFINED VARIABLE - fuzz_crash_020.md:108:4:108:5
-UNDEFINED VARIABLE - fuzz_crash_020.md:108:6:108:8
-UNUSED VARIABLE - fuzz_crash_020.md:88:1:88:2
+UNDEFINED VARIABLE - fuzz_crash_020.md:52:11:52:14
+UNDEFINED VARIABLE - fuzz_crash_020.md:57:2:57:4
+UNDEFINED VARIABLE - fuzz_crash_020.md:60:12:60:15
+NOT IMPLEMENTED - fuzz_crash_020.md:74:9:74:15
+UNDEFINED VARIABLE - fuzz_crash_020.md:97:2:97:3
+fuzz_crash_020.md:88:1:88:2: - fuzz_crash_020.md:88:1:88:2
 UNUSED VARIABLE - fuzz_crash_020.md:96:2:96:4
 UNUSED VARIABLE - fuzz_crash_020.md:76:2:76:3
 UNUSED VARIABLE - fuzz_crash_020.md:87:2:87:3
 UNDECLARED TYPE - fuzz_crash_020.md:116:5:116:6
-not_implemented - fuzz_crash_020.md:1:1:1:1
 # PROBLEMS
+**UNDECLARED TYPE**
+The type ``Lis`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_020.md:13:13:13:16:**
+```roc
+Map(a, b) : Lis, (ab) -> List(b)
+```
+            ^^^
+
+
+**UNDECLARED TYPE VARIABLE**
+The type variable ``ab`` is not declared in this scope.
+
+Type variables must be introduced in a type annotation before they can be used.
+
+This type variable is referenced here:
+**fuzz_crash_020.md:13:19:13:21:**
+```roc
+Map(a, b) : Lis, (ab) -> List(b)
+```
+                  ^^
+
+
+**UNDECLARED TYPE VARIABLE**
+The type variable ``ab`` is not declared in this scope.
+
+Type variables must be introduced in a type annotation before they can be used.
+
+This type variable is referenced here:
+**fuzz_crash_020.md:19:4:19:6:**
+```roc
+		(ab) -> # row
+```
+   ^^
+
+
+**UNDECLARED TYPE VARIABLE**
+The type variable ``b`` is not declared in this scope.
+
+Type variables must be introduced in a type annotation before they can be used.
+
+This type variable is referenced here:
+**fuzz_crash_020.md:20:12:20:13:**
+```roc
+			List(			b	) #z)
+```
+           ^
+
+
+**UNDECLARED TYPE**
+The type ``O`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_020.md:24:15:24:16:**
+```roc
+Som : { foo : O, bar : g }
+```
+              ^
+
+
+**UNDECLARED TYPE VARIABLE**
+The type variable ``g`` is not declared in this scope.
+
+Type variables must be introduced in a type annotation before they can be used.
+
+This type variable is referenced here:
+**fuzz_crash_020.md:24:24:24:25:**
+```roc
+Som : { foo : O, bar : g }
+```
+                       ^
+
+
+**UNDECLARED TYPE**
+The type ``U6`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_020.md:37:7:37:9:**
+```roc
+one : U6
+```
+      ^^
+
+
+**UNDEFINED VARIABLE**
+Nothing is named `num` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize dbg expression
+Let us know if you want to help!
+
+**UNDEFINED VARIABLE**
+Nothing is named `exp0` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize dbg expression
+Let us know if you want to help!
+
+**UNDEFINED VARIABLE**
+Nothing is named `r` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNUSED VARIABLE**
+Variable ``lue`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_lue` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_020.md:52:11:52:14:**
+```roc
+	match a {lue  {
+```
+          ^^^
+
+
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNUSED VARIABLE**
+Variable ``er`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_er` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_020.md:57:2:57:4:**
+```roc
+	er #ent
+```
+ ^^
+
+
+**UNDEFINED VARIABLE**
+Nothing is named `ment` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNUSED VARIABLE**
+Variable ``est`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_est` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_020.md:60:12:60:15:**
+```roc
+		[1, 2, 3,est]123
+```
+           ^^^
+
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize alternatives pattern
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: top-level expect
+Let us know if you want to help!
+
+**UNDECLARED TYPE**
+The type ``Listlt`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_020.md:74:9:74:15:**
+```roc
+main! : Listlt({}, _)
+```
+        ^^^^^^
+
+
+**UNDEFINED VARIABLE**
+Nothing is named `e` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: statement type in block
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: statement type in block
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: ...
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: ...
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: crash statement
+Let us know if you want to help!
+
+**UNDEFINED VARIABLE**
+Nothing is named `d` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `one` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: statement type in block
+Let us know if you want to help!
+
+**UNDEFINED VARIABLE**
+Nothing is named `tag` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `world` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `ned` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**DUPLICATE DEFINITION**
+The name `t` is being redeclared in this scope.
+
+The redeclaration is here:
+**fuzz_crash_020.md:97:2:97:3:**
+```roc
+	t = (123, "World", tag, O, (nd, t), [1, 2, 3])
+```
+ ^
+
+But `t` was already defined here:
+**fuzz_crash_020.md:88:1:88:2:**
+```roc
+t = [
+```
+^
+
+
+**UNDEFINED VARIABLE**
+Nothing is named `tag` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `nd` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `m` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `ag1` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `ne` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `tuple` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `b` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize suffix_single_question expression
+Let us know if you want to help!
+
+**UNDEFINED VARIABLE**
+Nothing is named `r` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `nu` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNUSED VARIABLE**
+Variable ``t`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_t` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_020.md:88:1:88:2:**
+```roc
+t = [
+```
+^
+
+
+**UNUSED VARIABLE**
+Variable ``rd`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_rd` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_020.md:96:2:96:4:**
+```roc
+	rd = { foo: 123, bar: "H", baz: tag, qux: Ok(world),ned }
+```
+ ^^
+
+
+**UNUSED VARIABLE**
+Variable ``w`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_w` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_020.md:76:2:76:3:**
+```roc
+	w = "d"
+```
+ ^
+
+
+**UNUSED VARIABLE**
+Variable ``i`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_i` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_020.md:87:2:87:3:**
+```roc
+	i= "H, ${d}"
+```
+ ^
+
+
+**UNDECLARED TYPE**
+The type ``V`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_020.md:116:5:116:6:**
+```roc
+t : V((a,c))
+```
+    ^
+
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: top-level expect
+Let us know if you want to help!
+
 **INCOMPATIBLE MATCH PATTERNS**
 The pattern in the fourth branch of this `match` differs from previous ones:
 **fuzz_crash_020.md:52:2:**
diff --git a/src/snapshots/fuzz_crash/fuzz_crash_021.md b/src/snapshots/fuzz_crash/fuzz_crash_021.md
index e9568012f4..c0d067d989 100644
--- a/src/snapshots/fuzz_crash/fuzz_crash_021.md
+++ b/src/snapshots/fuzz_crash/fuzz_crash_021.md
@@ -10,12 +10,10 @@ Fli/main.roc" }
 Pair(a, b+ : (
 ~~~
 # EXPECTED
-UnclosedString - fuzz_crash_021.md:1:14:1:16
-missing_header - fuzz_crash_021.md:1:1:1:5
+UNCLOSED STRING - fuzz_crash_021.md:1:1:1:5
 UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_021.md:1:4:1:9
-expected_ty_anno_end - fuzz_crash_021.md:3:1:3:6
-expected_ty_anno_end - fuzz_crash_021.md:3:15:3:15
-MALFORMED TYPE - fuzz_crash_021.md:3:14:3:15
+PARSE ERROR - fuzz_crash_021.md:3:1:3:6
+PARSE ERROR - fuzz_crash_021.md:3:15:3:15
 # PROBLEMS
 **UNCLOSED STRING**
 This string is missing a closing quote.
@@ -72,6 +70,21 @@ Pair(a, b+ : (
               
 
 
+**MALFORMED TYPE**
+This type annotation is malformed or contains invalid syntax.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 # TOKENS
 ~~~zig
 UpperIdent(1:1-1:4),OpSlash(1:4-1:5),LowerIdent(1:5-1:9),NoSpaceDotLowerIdent(1:9-1:13),StringStart(1:13-1:14),StringPart(1:14-1:16),StringEnd(1:16-1:16),Newline(1:1-1:1),
diff --git a/src/snapshots/fuzz_crash/fuzz_crash_022.md b/src/snapshots/fuzz_crash/fuzz_crash_022.md
index 377b0ec4b6..0e5aa1290c 100644
--- a/src/snapshots/fuzz_crash/fuzz_crash_022.md
+++ b/src/snapshots/fuzz_crash/fuzz_crash_022.md
@@ -15,12 +15,12 @@ getUser = |id| if (id > 1!) "big" else "l"
 -ain! = |_| getUser(900)
 ~~~
 # EXPECTED
-expected_package_or_platform_name - fuzz_crash_022.md:1:1:1:6
+PARSE ERROR - fuzz_crash_022.md:1:1:1:6
 UNEXPECTED TOKEN IN TYPE ANNOTATION - fuzz_crash_022.md:1:19:1:29
-expected_expr_close_round_or_comma - fuzz_crash_022.md:6:27:6:30
+UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_022.md:1:32:1:32
+PARSE ERROR - fuzz_crash_022.md:6:27:6:30
 UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_022.md:8:1:8:6
-MALFORMED TYPE - fuzz_crash_022.md:1:19:1:29
-UNUSED VARIABLE - fuzz_crash_022.md:6:12:6:14
+MALFORMED TYPE - fuzz_crash_022.md:6:12:6:14
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `expected_package_or_platform_name`
@@ -82,6 +82,38 @@ Here is the problematic code:
 ^^^^^
 
 
+**MALFORMED TYPE**
+This type annotation is malformed or contains invalid syntax.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID IF CONDITION**
+The condition in this `if` expression could not be processed.
+
+The condition must be a valid expression that evaluates to a `Bool` value (`Bool.true` or `Bool.false`).
+
+**UNUSED VARIABLE**
+Variable ``id`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_id` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_022.md:6:12:6:14:**
+```roc
+getUser = |id| if (id > 1!) "big" else "l"
+```
+           ^^
+
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 # TOKENS
 ~~~zig
 KwApp(1:1-1:4),OpenSquare(1:5-1:6),LowerIdent(1:6-1:11),CloseSquare(1:11-1:12),OpenCurly(1:13-1:14),OpBar(1:15-1:16),LowerIdent(1:16-1:17),OpColon(1:17-1:18),KwPlatform(1:19-1:27),StringStart(1:28-1:29),StringPart(1:29-1:30),StringEnd(1:30-1:31),CloseCurly(1:32-1:33),Newline(1:1-1:1),
diff --git a/src/snapshots/fuzz_crash/fuzz_crash_023.md b/src/snapshots/fuzz_crash/fuzz_crash_023.md
index e88e2cafb1..192d829b4d 100644
--- a/src/snapshots/fuzz_crash/fuzz_crash_023.md
+++ b/src/snapshots/fuzz_crash/fuzz_crash_023.md
@@ -218,75 +218,6 @@ UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_023.md:89:9:90:4
 UNEXPECTED TOKEN IN PATTERN - fuzz_crash_023.md:90:3:90:28
 UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_023.md:90:6:91:9
 UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_023.md:1:1:92:4
-UNEXPECTED TOKEN IN PATTERN - fuzz_crash_023.md:92:3:92:8
-UNEXPECTED TOKEN IN PATTERN - fuzz_crash_023.md:93:4:93:8
-expected_expr_record_field_name - fuzz_crash_023.md:178:37:178:40
-expected_expr_close_curly_or_comma - fuzz_crash_023.md:178:38:178:41
-UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_023.md:178:40:178:45
-UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_023.md:178:45:178:50
-expected_arrow - fuzz_crash_023.md:178:52:178:55
-UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_023.md:1:1:179:7
-UNDECLARED TYPE - fuzz_crash_023.md:36:8:36:11
-UNDECLARED TYPE - fuzz_crash_023.md:36:13:36:16
-UNDECLARED TYPE - fuzz_crash_023.md:39:2:39:5
-UNDECLARED TYPE - fuzz_crash_023.md:40:2:40:5
-UNDECLARED TYPE - fuzz_crash_023.md:43:19:43:21
-UNDECLARED TYPE - fuzz_crash_023.md:43:32:43:41
-UNDECLARED TYPE - fuzz_crash_023.md:45:8:45:10
-UNDECLARED TYPE - fuzz_crash_023.md:46:8:46:17
-UNDECLARED TYPE - fuzz_crash_023.md:52:4:52:6
-UNDECLARED TYPE - fuzz_crash_023.md:53:8:53:17
-not_implemented - fuzz_crash_023.md:6:1:12:4
-not_implemented - fuzz_crash_023.md:1:1:1:1
-not_implemented - fuzz_crash_023.md:1:1:1:1
-not_implemented - fuzz_crash_023.md:1:1:1:1
-not_implemented - fuzz_crash_023.md:1:1:1:1
-not_implemented - fuzz_crash_023.md:1:1:1:1
-expr_not_canonicalized - fuzz_crash_023.md:89:9:90:4
-expr_not_canonicalized - fuzz_crash_023.md:90:6:91:9
-expr_not_canonicalized - fuzz_crash_023.md:1:1:92:4
-UNUSED VARIABLE - fuzz_crash_023.md:97:3:97:8
-not_implemented - fuzz_crash_023.md:1:1:1:1
-UNUSED VARIABLE - fuzz_crash_023.md:102:19:102:23
-not_implemented - fuzz_crash_023.md:1:1:1:1
-UNUSED VARIABLE - fuzz_crash_023.md:108:23:108:27
-not_implemented - fuzz_crash_023.md:1:1:1:1
-UNUSED VARIABLE - fuzz_crash_023.md:115:6:115:10
-not_implemented - fuzz_crash_023.md:1:1:1:1
-not_implemented - fuzz_crash_023.md:1:1:1:1
-not_implemented - fuzz_crash_023.md:121:5:121:12
-not_implemented - fuzz_crash_023.md:1:1:1:1
-not_implemented - fuzz_crash_023.md:123:4:125:8
-not_implemented - fuzz_crash_023.md:130:5:130:12
-not_implemented - fuzz_crash_023.md:132:4:132:11
-UNUSED VARIABLE - fuzz_crash_023.md:82:2:82:3
-not_implemented - fuzz_crash_023.md:1:1:1:1
-UNDECLARED TYPE - fuzz_crash_023.md:143:14:143:20
-not_implemented - fuzz_crash_023.md:1:1:1:1
-not_implemented - fuzz_crash_023.md:1:1:1:1
-not_implemented - fuzz_crash_023.md:154:2:154:5
-not_implemented - fuzz_crash_023.md:156:3:156:6
-UNDEFINED VARIABLE - fuzz_crash_023.md:158:2:158:11
-not_implemented - fuzz_crash_023.md:1:1:1:1
-not_implemented - fuzz_crash_023.md:162:2:163:49
-not_implemented - fuzz_crash_023.md:1:1:1:1
-not_implemented - fuzz_crash_023.md:1:1:1:1
-UNDEFINED VARIABLE - fuzz_crash_023.md:179:42:179:48
-UNDEFINED VARIABLE - fuzz_crash_023.md:183:3:183:7
-UNDEFINED VARIABLE - fuzz_crash_023.md:185:4:185:10
-UNDEFINED VARIABLE - fuzz_crash_023.md:188:22:188:25
-not_implemented - fuzz_crash_023.md:1:1:1:1
-not_implemented - fuzz_crash_023.md:1:1:1:1
-UNDEFINED VARIABLE - fuzz_crash_023.md:193:4:193:13
-UNUSED VARIABLE - fuzz_crash_023.md:180:2:180:17
-UNUSED VARIABLE - fuzz_crash_023.md:178:2:178:8
-UNUSED VARIABLE - fuzz_crash_023.md:164:2:164:18
-UNUSED VARIABLE - fuzz_crash_023.md:166:2:166:6
-UNUSED VARIABLE - fuzz_crash_023.md:188:2:188:15
-UNUSED VARIABLE - fuzz_crash_023.md:189:2:189:23
-UNUSED VARIABLE - fuzz_crash_023.md:165:2:165:14
-UNDECLARED TYPE - fuzz_crash_023.md:201:9:201:14
-not_implemented - fuzz_crash_023.md:1:1:1:1
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token ** After pattern in alt
@@ -970,6 +901,442 @@ main! = |_| { # Yeah I can leave a comment here
 ```
 
 
+**UNDECLARED TYPE**
+The type ``Bar`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_023.md:36:8:36:11:**
+```roc
+Foo : (Bar, Baz)
+```
+       ^^^
+
+
+**UNDECLARED TYPE**
+The type ``Baz`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_023.md:36:13:36:16:**
+```roc
+Foo : (Bar, Baz)
+```
+            ^^^
+
+
+**UNDECLARED TYPE**
+The type ``Bar`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_023.md:39:2:39:5:**
+```roc
+	Bar, # Comment after pattern tuple item
+```
+ ^^^
+
+
+**UNDECLARED TYPE**
+The type ``Baz`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_023.md:40:2:40:5:**
+```roc
+	Baz, # Another after pattern tuple item
+```
+ ^^^
+
+
+**UNDECLARED TYPE**
+The type ``Ok`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_023.md:43:19:43:21:**
+```roc
+Some(a) : { foo : Ok(a), bar : Something }
+```
+                  ^^
+
+
+**UNDECLARED TYPE**
+The type ``Something`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_023.md:43:32:43:41:**
+```roc
+Some(a) : { foo : Ok(a), bar : Something }
+```
+                               ^^^^^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Ok`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_023.md:45:8:45:10:**
+```roc
+	foo : Ok(a), # After field
+```
+       ^^
+
+
+**UNDECLARED TYPE**
+The type ``Something`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_023.md:46:8:46:17:**
+```roc
+	bar : Something, # After last field
+```
+       ^^^^^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Ok`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_023.md:52:4:52:6:**
+```roc
+			Ok(a), # Comment after pattern record field
+```
+   ^^
+
+
+**UNDECLARED TYPE**
+The type ``Something`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_023.md:53:8:53:17:**
+```roc
+	bar : Something, # Another after pattern record field
+```
+       ^^^^^^^^^
+
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: malformed import module name contains invalid control characters
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: Exposed item 'line!' already imported from module 'pf.Stdout', cannot import again from module 'MALFORMED_IMPORT'
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: Exposed item 'write!' already imported from module 'pf.Stdout', cannot import again from module 'MALFORMED_IMPORT'
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize dbg expression
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize dbg expression
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize alternatives pattern
+Let us know if you want to help!
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNUSED VARIABLE**
+Variable ``lower`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_lower` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_023.md:97:3:97:8:**
+```roc
+		lower # After pattern comment
+```
+  ^^^^^
+
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize alternatives pattern
+Let us know if you want to help!
+
+**UNUSED VARIABLE**
+Variable ``rest`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_rest` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_023.md:102:19:102:23:**
+```roc
+		[1, 2, 3, .. as rest] # After pattern comment
+```
+                  ^^^^
+
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize alternatives pattern
+Let us know if you want to help!
+
+**UNUSED VARIABLE**
+Variable ``rest`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_rest` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_023.md:108:23:108:27:**
+```roc
+		[1, 2 | 5, 3, .. as rest] => 123
+```
+                      ^^^^
+
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize alternatives pattern
+Let us know if you want to help!
+
+**UNUSED VARIABLE**
+Variable ``rest`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_rest` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_023.md:115:6:115:10:**
+```roc
+					rest, # After last pattern in list
+```
+     ^^^^
+
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize alternatives pattern
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize alternatives pattern
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: record pattern with sub-patterns
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize local_dispatch expression
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: record pattern with sub-patterns
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: record pattern with sub-patterns
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: record pattern with sub-patterns
+Let us know if you want to help!
+
+**UNUSED VARIABLE**
+Variable ``b`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_b` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_023.md:82:2:82:3:**
+```roc
+	b,
+```
+ ^
+
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: top-level expect
+Let us know if you want to help!
+
+**UNDECLARED TYPE**
+The type ``String`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_023.md:143:14:143:20:**
+```roc
+main! : List(String) -> Result({}, _)
+```
+             ^^^^^^
+
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: statement type in block
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: statement type in block
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: ...
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: ...
+Let us know if you want to help!
+
+**UNDEFINED VARIABLE**
+Nothing is named `some_func` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize dbg expression
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: crash statement
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize dbg expression
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: statement type in block
+Let us know if you want to help!
+
+**MALFORMED TYPE**
+This type annotation is malformed or contains invalid syntax.
+
+**UNDEFINED VARIABLE**
+Nothing is named `nested` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `tag1` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `nested` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `foo` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize suffix_single_question expression
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize suffix_single_question expression
+Let us know if you want to help!
+
+**UNDEFINED VARIABLE**
+Nothing is named `toStr` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNUSED VARIABLE**
+Variable ``multiline_tuple`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_multiline_tuple` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_023.md:180:2:180:17:**
+```roc
+	multiline_tuple = (
+```
+ ^^^^^^^^^^^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``record`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_record` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_023.md:178:2:178:8:**
+```roc
+	record = { foo: 123, bar: "Hello", ;az: tag, qux: Ok(world), punned }
+```
+ ^^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``tag_with_payload`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_tag_with_payload` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_023.md:164:2:164:18:**
+```roc
+	tag_with_payload = Ok(number)
+```
+ ^^^^^^^^^^^^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``list`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_list` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_023.md:166:2:166:6:**
+```roc
+	list = [
+```
+ ^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``bin_op_result`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_bin_op_result` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_023.md:188:2:188:15:**
+```roc
+	bin_op_result = Err(foo) ?? 12 > 5 * 5 or 13 + 2 < 5 and 10 - 1 >= 16 or 12 <= 3 / 5
+```
+ ^^^^^^^^^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``static_dispatch_style`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_static_dispatch_style` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_023.md:189:2:189:23:**
+```roc
+	static_dispatch_style = some_fn(arg1)?.static_dispatch_method()?.next_static_dispatch_method()?.record_field?
+```
+ ^^^^^^^^^^^^^^^^^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``interpolated`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_interpolated` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_023.md:165:2:165:14:**
+```roc
+	interpolated = "Hello, ${world}"
+```
+ ^^^^^^^^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Value`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_023.md:201:9:201:14:**
+```roc
+tuple : Value((a, b, c))
+```
+        ^^^^^
+
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: top-level expect
+Let us know if you want to help!
+
 **TYPE MISMATCH**
 This expression is used in an unexpected way:
 **fuzz_crash_023.md:68:1:68:8:**
diff --git a/src/snapshots/fuzz_crash/fuzz_crash_024.md b/src/snapshots/fuzz_crash/fuzz_crash_024.md
index b173fd554c..075763e7a8 100644
--- a/src/snapshots/fuzz_crash/fuzz_crash_024.md
+++ b/src/snapshots/fuzz_crash/fuzz_crash_024.md
@@ -14,14 +14,15 @@ var t= ]
 var t= 0
 ~~~
 # EXPECTED
-UnclosedString - fuzz_crash_024.md:1:34:1:53
-MismatchedBrace - fuzz_crash_024.md:4:8:4:8
-exposed_item_unexpected_token - fuzz_crash_024.md:1:9:1:17
+UNCLOSED STRING - fuzz_crash_024.md:1:9:1:17
 UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_024.md:1:24:1:34
-expected_expr_close_curly_or_comma - fuzz_crash_024.md:1:33:1:53
+PARSE ERROR - fuzz_crash_024.md:1:33:1:53
 UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_024.md:1:34:1:53
-var_only_allowed_in_a_body - fuzz_crash_024.md:4:1:4:6
-var_only_allowed_in_a_body - fuzz_crash_024.md:7:1:7:6
+UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_024.md:1:53:1:53
+PARSE ERROR - fuzz_crash_024.md:4:1:4:6
+UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_024.md:4:8:4:8
+PARSE ERROR - fuzz_crash_024.md:7:1:7:6
+INVALID STATEMENT - fuzz_crash_024.md:7:5:7:6
 # PROBLEMS
 **UNCLOSED STRING**
 This string is missing a closing quote.
@@ -125,6 +126,40 @@ var t= 0
 ^^^^^
 
 
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**DUPLICATE DEFINITION**
+The name `t` is being redeclared in this scope.
+
+The redeclaration is here:
+**fuzz_crash_024.md:7:5:7:6:**
+```roc
+var t= 0
+```
+    ^
+
+But `t` was already defined here:
+**fuzz_crash_024.md:4:5:4:6:**
+```roc
+var t= ]
+```
+    ^
+
+
 # TOKENS
 ~~~zig
 KwModule(1:1-1:7),OpenSquare(1:8-1:9),KwModule(1:9-1:15),CloseSquare(1:16-1:17),OpenCurly(1:18-1:19),LowerIdent(1:20-1:22),OpColon(1:22-1:23),KwPlatform(1:24-1:32),StringStart(1:33-1:34),StringPart(1:34-1:53),StringEnd(1:53-1:53),Newline(1:1-1:1),
diff --git a/src/snapshots/fuzz_crash/fuzz_crash_025.md b/src/snapshots/fuzz_crash/fuzz_crash_025.md
index e31fb057b2..8754370e64 100644
--- a/src/snapshots/fuzz_crash/fuzz_crash_025.md
+++ b/src/snapshots/fuzz_crash/fuzz_crash_025.md
@@ -34,9 +34,12 @@ j : I128
 j = -17011687303715884105728
 ~~~
 # EXPECTED
+PARSE ERROR - fuzz_crash_025.md:10:15:10:15
 UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_025.md:11:3:11:25
 UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_025.md:14:48:14:52
+PARSE ERROR - fuzz_crash_025.md:14:50:14:50
 UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_025.md:15:3:15:5
+INVALID STATEMENT - fuzz_crash_025.md:14:1:14:2
 # PROBLEMS
 **PARSE ERROR**
 Type applications require parentheses around their type arguments.
@@ -122,6 +125,26 @@ f =8
   ^^
 
 
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 **TYPE MISMATCH**
 This expression is used in an unexpected way:
 **fuzz_crash_025.md:14:1:14:2:**
diff --git a/src/snapshots/fuzz_crash/fuzz_crash_026.md b/src/snapshots/fuzz_crash/fuzz_crash_026.md
index 901c8358c1..19fdb8dbcb 100644
Binary files a/src/snapshots/fuzz_crash/fuzz_crash_026.md and b/src/snapshots/fuzz_crash/fuzz_crash_026.md differ
diff --git a/src/snapshots/fuzz_crash/fuzz_crash_027.md b/src/snapshots/fuzz_crash/fuzz_crash_027.md
index 5364b45700..a13983ec91 100644
--- a/src/snapshots/fuzz_crash/fuzz_crash_027.md
+++ b/src/snapshots/fuzz_crash/fuzz_crash_027.md
@@ -166,74 +166,9 @@ expect {
 }
 ~~~
 # EXPECTED
-OverClosedBrace - fuzz_crash_027.md:40:5:40:5
-LeadingZero - fuzz_crash_027.md:69:2:69:2
-UnclosedString - fuzz_crash_027.md:118:9:118:22
-MismatchedBrace - fuzz_crash_027.md:125:3:125:3
-MismatchedBrace - fuzz_crash_027.md:126:2:126:2
-MismatchedBrace - fuzz_crash_027.md:148:1:148:1
-expected_ty_close_curly_or_comma - fuzz_crash_027.md:34:12:35:2
-expected_ty_close_curly_or_comma - fuzz_crash_027.md:1:1:39:2
-UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_027.md:39:1:39:4
-expected_expr_apply_close_round - fuzz_crash_027.md:122:3:122:11
-UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_027.md:125:4:125:9
-UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_027.md:125:9:125:15
-UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_027.md:148:1:148:17
-UNDECLARED TYPE - fuzz_crash_027.md:26:8:26:11
-UNDECLARED TYPE - fuzz_crash_027.md:26:13:26:16
-UNDECLARED TYPE - fuzz_crash_027.md:32:19:32:21
-undeclared_type_var - fuzz_crash_027.md:32:32:32:33
-MALFORMED TYPE - fuzz_crash_027.md:34:12:35:2
-MALFORMED TYPE - fuzz_crash_027.md:1:1:39:2
-UNDECLARED TYPE - fuzz_crash_027.md:43:11:43:16
-UNDECLARED TYPE - fuzz_crash_027.md:43:26:43:31
-UNDECLARED TYPE - fuzz_crash_027.md:29:2:29:5
-UNDECLARED TYPE - fuzz_crash_027.md:30:2:30:5
-not_implemented - fuzz_crash_027.md:1:1:1:1
-not_implemented - fuzz_crash_027.md:1:1:1:1
-not_implemented - fuzz_crash_027.md:1:1:1:1
-UNDEFINED VARIABLE - fuzz_crash_027.md:65:4:65:5
-UNDEFINED VARIABLE - fuzz_crash_027.md:65:6:65:7
-not_implemented - fuzz_crash_027.md:1:1:1:1
-UNDEFINED VARIABLE - fuzz_crash_027.md:71:7:71:11
-UNUSED VARIABLE - fuzz_crash_027.md:70:38:70:42
-not_implemented - fuzz_crash_027.md:1:1:1:1
-UNUSED VARIABLE - fuzz_crash_027.md:74:23:74:27
-UNUSED VARIABLE - fuzz_crash_027.md:76:1:76:4
-not_implemented - fuzz_crash_027.md:1:1:1:1
-not_implemented - fuzz_crash_027.md:1:1:1:1
-not_implemented - fuzz_crash_027.md:82:5:82:12
-not_implemented - fuzz_crash_027.md:1:1:1:1
-not_implemented - fuzz_crash_027.md:84:4:86:8
-not_implemented - fuzz_crash_027.md:89:5:89:12
-not_implemented - fuzz_crash_027.md:91:4:91:11
-UNUSED VARIABLE - fuzz_crash_027.md:62:2:62:3
-not_implemented - fuzz_crash_027.md:1:1:1:1
-UNDECLARED TYPE - fuzz_crash_027.md:99:14:99:20
-not_implemented - fuzz_crash_027.md:1:1:1:1
-not_implemented - fuzz_crash_027.md:1:1:1:1
-not_implemented - fuzz_crash_027.md:110:2:110:5
-not_implemented - fuzz_crash_027.md:112:3:112:6
-UNDEFINED VARIABLE - fuzz_crash_027.md:114:2:114:11
-not_implemented - fuzz_crash_027.md:1:1:1:1
-not_implemented - fuzz_crash_027.md:1:1:1:1
-UNDEFINED VARIABLE - fuzz_crash_027.md:131:63:131:71
-UNDEFINED VARIABLE - fuzz_crash_027.md:132:42:132:48
-UNDEFINED VARIABLE - fuzz_crash_027.md:136:3:136:7
-UNDEFINED VARIABLE - fuzz_crash_027.md:138:4:138:10
-UNDEFINED VARIABLE - fuzz_crash_027.md:141:14:141:17
-not_implemented - fuzz_crash_027.md:1:1:1:1
-UNDEFINED VARIABLE - fuzz_crash_027.md:145:4:145:13
-UNDECLARED TYPE - fuzz_crash_027.md:153:9:153:14
-not_implemented - fuzz_crash_027.md:1:1:1:1
-UNUSED VARIABLE - fuzz_crash_027.md:131:2:131:8
-UNUSED VARIABLE - fuzz_crash_027.md:121:2:121:6
-UNUSED VARIABLE - fuzz_crash_027.md:133:2:133:9
-UNUSED VARIABLE - fuzz_crash_027.md:142:2:142:7
-UNUSED VARIABLE - fuzz_crash_027.md:151:1:151:6
-UNUSED VARIABLE - fuzz_crash_027.md:119:2:119:10
-UNUSED VARIABLE - fuzz_crash_027.md:141:2:141:7
-UNUSED VARIABLE - fuzz_crash_027.md:120:2:120:6
+OVER CLOSED BRACE - fuzz_crash_027.md:34:12:35:2
+UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_027.md:35:1:35:1
+PARSE ERROR - fuzz_crash_027.md:1:1:39:2
 # PROBLEMS
 **OVER CLOSED BRACE**
 There are too many closing braces here.
@@ -398,6 +333,404 @@ Here is the problematic code:
 ^^^^^^^^^^^^^^^^
 
 
+**UNDECLARED TYPE**
+The type ``Bar`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_027.md:26:8:26:11:**
+```roc
+Foo : (Bar, Baz)
+```
+       ^^^
+
+
+**UNDECLARED TYPE**
+The type ``Baz`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_027.md:26:13:26:16:**
+```roc
+Foo : (Bar, Baz)
+```
+            ^^^
+
+
+**UNDECLARED TYPE**
+The type ``Ok`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_027.md:32:19:32:21:**
+```roc
+Some(a) : { foo : Ok(a), bar : g }
+```
+                  ^^
+
+
+**UNDECLARED TYPE VARIABLE**
+The type variable ``g`` is not declared in this scope.
+
+Type variables must be introduced in a type annotation before they can be used.
+
+This type variable is referenced here:
+**fuzz_crash_027.md:32:32:32:33:**
+```roc
+Some(a) : { foo : Ok(a), bar : g }
+```
+                               ^
+
+
+**MALFORMED TYPE**
+This type annotation is malformed or contains invalid syntax.
+
+**MALFORMED TYPE**
+This type annotation is malformed or contains invalid syntax.
+
+**UNDECLARED TYPE**
+The type ``Maybe`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_027.md:43:11:43:16:**
+```roc
+Func(a) : Maybe(a), a -> Maybe(a)
+```
+          ^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Maybe`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_027.md:43:26:43:31:**
+```roc
+Func(a) : Maybe(a), a -> Maybe(a)
+```
+                         ^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Bar`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_027.md:29:2:29:5:**
+```roc
+	Bar, #
+```
+ ^^^
+
+
+**UNDECLARED TYPE**
+The type ``Baz`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_027.md:30:2:30:5:**
+```roc
+	Baz, #m
+```
+ ^^^
+
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize dbg expression
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize dbg expression
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize alternatives pattern
+Let us know if you want to help!
+
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize alternatives pattern
+Let us know if you want to help!
+
+**UNDEFINED VARIABLE**
+Nothing is named `ment` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNUSED VARIABLE**
+Variable ``rest`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_rest` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_027.md:70:38:70:42:**
+```roc
+		"foo" | "bar" => 20[1, 2, 3, .. as rest] # Aftet
+```
+                                     ^^^^
+
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize alternatives pattern
+Let us know if you want to help!
+
+**UNUSED VARIABLE**
+Variable ``rest`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_rest` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_027.md:74:23:74:27:**
+```roc
+		[1, 2 | 5, 3, .. as rest] => 123
+```
+                      ^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``ist`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_ist` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_027.md:76:1:76:4:**
+```roc
+ist
+```
+^^^
+
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize alternatives pattern
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize alternatives pattern
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: record pattern with sub-patterns
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize local_dispatch expression
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: record pattern with sub-patterns
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: record pattern with sub-patterns
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: record pattern with sub-patterns
+Let us know if you want to help!
+
+**UNUSED VARIABLE**
+Variable ``b`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_b` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_027.md:62:2:62:3:**
+```roc
+	b,
+```
+ ^
+
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: top-level expect
+Let us know if you want to help!
+
+**UNDECLARED TYPE**
+The type ``String`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_027.md:99:14:99:20:**
+```roc
+main! : List(String) -> Result({}, _)
+```
+             ^^^^^^
+
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: statement type in block
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: statement type in block
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: ...
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: ...
+Let us know if you want to help!
+
+**UNDEFINED VARIABLE**
+Nothing is named `some_func` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize dbg expression
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: crash statement
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: statement type in block
+Let us know if you want to help!
+
+**UNDEFINED VARIABLE**
+Nothing is named `punned` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `nested` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `tag1` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `nested` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `foo` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize suffix_single_question expression
+Let us know if you want to help!
+
+**UNDEFINED VARIABLE**
+Nothing is named `toStr` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDECLARED TYPE**
+The type ``Value`` is not declared in this scope.
+
+This type is referenced here:
+**fuzz_crash_027.md:153:9:153:14:**
+```roc
+tuple : Value((a, b, c))
+```
+        ^^^^^
+
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: statement type in block
+Let us know if you want to help!
+
+**UNUSED VARIABLE**
+Variable ``record`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_record` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_027.md:131:2:131:8:**
+```roc
+	record = { foo: 123, bar: "Hello", baz: tag, qux: Ok(world), punned }
+```
+ ^^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``list`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_list` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_027.md:121:2:121:6:**
+```roc
+	list = [
+```
+ ^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``m_tuple`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_m_tuple` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_027.md:133:2:133:9:**
+```roc
+	m_tuple = (
+```
+ ^^^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``stale`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_stale` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_027.md:142:2:142:7:**
+```roc
+	stale = some_fn(arg1)?.statod()?.ned()?.recd?
+```
+ ^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``empty`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_empty` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_027.md:151:1:151:6:**
+```roc
+empty = {}
+```
+^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``tag_with`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_tag_with` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_027.md:119:2:119:10:**
+```roc
+	tag_with = Ok(number)
+```
+ ^^^^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``bsult`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_bsult` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_027.md:141:2:141:7:**
+```roc
+	bsult = Err(foo) ?? 12 > 5 * 5 or 13 + 2 < 5 and 10 - 1 >= 16 or 12 <= 3 / 5
+```
+ ^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``ited`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_ited` to suppress this warning.
+The unused variable is declared here:
+**fuzz_crash_027.md:120:2:120:6:**
+```roc
+	ited = "Hello, ${world}"
+```
+ ^^^^
+
+
 **TYPE MISMATCH**
 This expression is used in an unexpected way:
 **fuzz_crash_027.md:48:1:48:8:**
diff --git a/src/snapshots/fuzz_crash/fuzz_crash_028.md b/src/snapshots/fuzz_crash/fuzz_crash_028.md
index 230c685bd8..0d541738ef 100644
Binary files a/src/snapshots/fuzz_crash/fuzz_crash_028.md and b/src/snapshots/fuzz_crash/fuzz_crash_028.md differ
diff --git a/src/snapshots/fuzz_crash/fuzz_crash_029.md b/src/snapshots/fuzz_crash/fuzz_crash_029.md
index 36c670764b..1b717a821d 100644
--- a/src/snapshots/fuzz_crash/fuzz_crash_029.md
+++ b/src/snapshots/fuzz_crash/fuzz_crash_029.md
@@ -24,17 +24,16 @@ ar,
 		]
 ~~~
 # EXPECTED
-MismatchedBrace - fuzz_crash_029.md:17:3:17:3
-expected_requires_rigids_close_curly - fuzz_crash_029.md:4:4:4:9
-invalid_type_arg - fuzz_crash_029.md:5:14:5:18
-expected_colon_after_type_annotation - fuzz_crash_029.md:5:9:5:14
+MISMATCHED BRACE - fuzz_crash_029.md:4:4:4:9
+PARSE ERROR - fuzz_crash_029.md:5:14:5:18
+PARSE ERROR - fuzz_crash_029.md:5:9:5:14
 UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_029.md:5:24:5:31
 UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_029.md:6:4:6:10
 UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_029.md:7:2:7:13
 UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_029.md:10:2:10:15
 UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_029.md:14:2:14:15
-expected_expr_close_round_or_comma - fuzz_crash_029.md:17:3:17:4
-expected_expr_close_square_or_comma - fuzz_crash_029.md:17:4:17:4
+PARSE ERROR - fuzz_crash_029.md:17:3:17:4
+LIST NOT CLOSED - fuzz_crash_029.md:17:4:17:4
 # PROBLEMS
 **MISMATCHED BRACE**
 This brace does not match the corresponding opening brace.
@@ -172,6 +171,46 @@ Here is the problematic code:
    
 
 
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 # TOKENS
 ~~~zig
 KwPlatform(1:1-1:9),Newline(1:11-1:14),
diff --git a/src/snapshots/fuzz_crash/fuzz_crash_030.md b/src/snapshots/fuzz_crash/fuzz_crash_030.md
index b2d5f992c6..b880f6a4b7 100644
--- a/src/snapshots/fuzz_crash/fuzz_crash_030.md
+++ b/src/snapshots/fuzz_crash/fuzz_crash_030.md
@@ -23,10 +23,11 @@ ar,
 		]
 ~~~
 # EXPECTED
-expected_exposes_close_square - fuzz_crash_030.md:8:3:8:6
+PARSE ERROR - fuzz_crash_030.md:8:5:8:5
+EXPECTED CLOSING BRACKET - fuzz_crash_030.md:8:3:8:6
 UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_030.md:9:3:9:10
 UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_030.md:10:2:10:15
-expected_expr_close_curly_or_comma - fuzz_crash_030.md:12:8:12:12
+PARSE ERROR - fuzz_crash_030.md:12:8:12:12
 UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_030.md:12:9:12:13
 UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_030.md:12:12:12:14
 UNEXPECTED TOKEN IN EXPRESSION - fuzz_crash_030.md:12:13:12:17
@@ -153,6 +154,46 @@ Here is the problematic code:
  ^^^^^^^^^^^^^
 
 
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 # TOKENS
 ~~~zig
 KwPlatform(1:1-1:9),Newline(1:11-1:14),
diff --git a/src/snapshots/fuzz_crash/fuzz_hang_001.md b/src/snapshots/fuzz_crash/fuzz_hang_001.md
index e9ed244e90..bd284db4a4 100644
--- a/src/snapshots/fuzz_crash/fuzz_hang_001.md
+++ b/src/snapshots/fuzz_crash/fuzz_hang_001.md
@@ -8,8 +8,8 @@ type=file
 0 (
 ~~~
 # EXPECTED
-missing_header - fuzz_hang_001.md:1:1:1:4
-expected_expr_close_round_or_comma - fuzz_hang_001.md:1:4:1:4
+MISSING HEADER - fuzz_hang_001.md:1:1:1:4
+PARSE ERROR - fuzz_hang_001.md:1:4:1:4
 # PROBLEMS
 **MISSING HEADER**
 Roc files must start with a module header.
@@ -39,6 +39,10 @@ Here is the problematic code:
    
 
 
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 # TOKENS
 ~~~zig
 Int(1:1-1:2),OpenRound(1:3-1:4),EndOfFile(1:4-1:4),
diff --git a/src/snapshots/header_expected_open_bracket.md b/src/snapshots/header_expected_open_bracket.md
index 12896d4255..d520144eb6 100644
--- a/src/snapshots/header_expected_open_bracket.md
+++ b/src/snapshots/header_expected_open_bracket.md
@@ -8,7 +8,7 @@ type=file
 module
 ~~~
 # EXPECTED
-header_expected_open_square - header_expected_open_bracket.md:1:7:1:7
+PARSE ERROR - header_expected_open_bracket.md:1:7:1:7
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `header_expected_open_square`
diff --git a/src/snapshots/hello_world_with_block.md b/src/snapshots/hello_world_with_block.md
index a228690cd1..4392bbbf02 100644
--- a/src/snapshots/hello_world_with_block.md
+++ b/src/snapshots/hello_world_with_block.md
@@ -21,7 +21,18 @@ main! = |_| {
 # EXPECTED
 UNUSED VARIABLE - hello_world_with_block.md:9:2:9:7
 # PROBLEMS
-NIL
+**UNUSED VARIABLE**
+Variable ``world`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_world` to suppress this warning.
+The unused variable is declared here:
+**hello_world_with_block.md:9:2:9:7:**
+```roc
+	world = "World"
+```
+ ^^^^^
+
+
 # TOKENS
 ~~~zig
 Newline(1:2-1:15),
diff --git a/src/snapshots/if_then_else/if_then_else_7.md b/src/snapshots/if_then_else/if_then_else_7.md
index 271b97a12d..2b73ba50dc 100644
--- a/src/snapshots/if_then_else/if_then_else_7.md
+++ b/src/snapshots/if_then_else/if_then_else_7.md
@@ -12,9 +12,12 @@ if bool {
 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - if_then_else_7.md:1:4:1:8
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `bool` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 KwIf(1:1-1:3),LowerIdent(1:4-1:8),OpenCurly(1:9-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/if_then_else/if_then_else_9.md b/src/snapshots/if_then_else/if_then_else_9.md
index d2614bff38..e2c17996ff 100644
--- a/src/snapshots/if_then_else/if_then_else_9.md
+++ b/src/snapshots/if_then_else/if_then_else_9.md
@@ -14,8 +14,12 @@ if bool {
 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - if_then_else_9.md:1:4:1:8
+NIL
 # PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `bool` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 **INVALID IF CONDITION**
 This `if` condition needs to be a _Bool_:
 **if_then_else_9.md:3:11:**
diff --git a/src/snapshots/if_then_else/if_then_else_comments_block.md b/src/snapshots/if_then_else/if_then_else_comments_block.md
index 598d522549..0099fb70b8 100644
--- a/src/snapshots/if_then_else/if_then_else_comments_block.md
+++ b/src/snapshots/if_then_else/if_then_else_comments_block.md
@@ -14,9 +14,12 @@ if # Comment after if
 		}
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - if_then_else_comments_block.md:2:2:2:6
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `bool` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 KwIf(1:1-1:3),Newline(1:5-1:22),
diff --git a/src/snapshots/if_then_else/if_then_else_comments_complex.md b/src/snapshots/if_then_else/if_then_else_comments_complex.md
index b9b7128bdd..84dbcac1b9 100644
--- a/src/snapshots/if_then_else/if_then_else_comments_complex.md
+++ b/src/snapshots/if_then_else/if_then_else_comments_complex.md
@@ -16,9 +16,12 @@ if # Comment after if
 				}
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - if_then_else_comments_complex.md:2:2:2:6
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `bool` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 KwIf(1:1-1:3),Newline(1:5-1:22),
diff --git a/src/snapshots/if_then_else/if_then_else_multi_comments.md b/src/snapshots/if_then_else/if_then_else_multi_comments.md
index 0874153000..3c04e0c13e 100644
--- a/src/snapshots/if_then_else/if_then_else_multi_comments.md
+++ b/src/snapshots/if_then_else/if_then_else_multi_comments.md
@@ -14,9 +14,12 @@ if # Comment after if
 		}
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - if_then_else_multi_comments.md:2:2:2:6
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `bool` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 KwIf(1:1-1:3),Newline(1:5-1:22),
diff --git a/src/snapshots/if_then_else/if_then_else_simple_block_formatting.md b/src/snapshots/if_then_else/if_then_else_simple_block_formatting.md
index 384c05c5b0..a59a5dcc8d 100644
--- a/src/snapshots/if_then_else/if_then_else_simple_block_formatting.md
+++ b/src/snapshots/if_then_else/if_then_else_simple_block_formatting.md
@@ -10,8 +10,12 @@ if bool {
 } else 2
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - if_then_else_simple_block_formatting.md:1:4:1:8
+NIL
 # PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `bool` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 **INCOMPATIBLE IF BRANCHES**
 This `if` has an `else` branch with a different type from it's `then` branch:
 **if_then_else_simple_block_formatting.md:1:1:**
diff --git a/src/snapshots/if_then_else/if_then_else_simple_comments_formatting.md b/src/snapshots/if_then_else/if_then_else_simple_comments_formatting.md
index 91225129bf..9125b66a3d 100644
--- a/src/snapshots/if_then_else/if_then_else_simple_comments_formatting.md
+++ b/src/snapshots/if_then_else/if_then_else_simple_comments_formatting.md
@@ -10,9 +10,12 @@ if bool { # Comment after then open
 } else B
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - if_then_else_simple_comments_formatting.md:1:4:1:8
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `bool` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 KwIf(1:1-1:3),LowerIdent(1:4-1:8),OpenCurly(1:9-1:10),Newline(1:12-1:36),
diff --git a/src/snapshots/if_then_else/if_then_else_simple_file.md b/src/snapshots/if_then_else/if_then_else_simple_file.md
index 4118ebee95..755e130838 100644
--- a/src/snapshots/if_then_else/if_then_else_simple_file.md
+++ b/src/snapshots/if_then_else/if_then_else_simple_file.md
@@ -14,9 +14,8 @@ foo = if 1 A
     }
 ~~~
 # EXPECTED
-no_else - if_then_else_simple_file.md:1:1:1:1
+PARSE ERROR - if_then_else_simple_file.md:1:1:1:1
 UNEXPECTED TOKEN IN EXPRESSION - if_then_else_simple_file.md:5:5:5:11
-expr_not_canonicalized - if_then_else_simple_file.md:1:1:1:1
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `no_else`
@@ -42,6 +41,18 @@ Here is the problematic code:
     ^^^^^^
 
 
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 # TOKENS
 ~~~zig
 KwModule(1:1-1:7),OpenSquare(1:8-1:9),LowerIdent(1:9-1:12),CloseSquare(1:12-1:13),Newline(1:1-1:1),
diff --git a/src/snapshots/if_then_else/if_then_else_simple_minimal.md b/src/snapshots/if_then_else/if_then_else_simple_minimal.md
index 040b7d1079..96de84eaeb 100644
--- a/src/snapshots/if_then_else/if_then_else_simple_minimal.md
+++ b/src/snapshots/if_then_else/if_then_else_simple_minimal.md
@@ -8,9 +8,12 @@ type=expr
 if bool 1 else 2
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - if_then_else_simple_minimal.md:1:4:1:8
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `bool` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 KwIf(1:1-1:3),LowerIdent(1:4-1:8),Int(1:9-1:10),KwElse(1:11-1:15),Int(1:16-1:17),EndOfFile(1:17-1:17),
diff --git a/src/snapshots/lambda_parameter_unused.md b/src/snapshots/lambda_parameter_unused.md
index 294f25fbbc..7a2ed4c1fa 100644
--- a/src/snapshots/lambda_parameter_unused.md
+++ b/src/snapshots/lambda_parameter_unused.md
@@ -33,9 +33,32 @@ main! = |_| {
 ~~~
 # EXPECTED
 UNUSED VARIABLE - lambda_parameter_unused.md:5:8:5:14
-used_underscore_variable - lambda_parameter_unused.md:9:22:9:29
+UNDERSCORE VARIABLE USED - lambda_parameter_unused.md:9:22:9:29
 # PROBLEMS
-NIL
+**UNUSED VARIABLE**
+Variable ``unused`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_unused` to suppress this warning.
+The unused variable is declared here:
+**lambda_parameter_unused.md:5:8:5:14:**
+```roc
+add = |unused| 42
+```
+       ^^^^^^
+
+
+**UNDERSCORE VARIABLE USED**
+Variable ``_factor`` is prefixed with an underscore but is actually used.
+
+Variables prefixed with `_` are intended to be unused. Remove the underscore prefix: `factor`.
+The underscore variable is declared here:
+**lambda_parameter_unused.md:9:22:9:29:**
+```roc
+multiply = |_factor| _factor * 2
+```
+                     ^^^^^^^
+
+
 # TOKENS
 ~~~zig
 KwApp(1:1-1:4),OpenSquare(1:5-1:6),LowerIdent(1:6-1:11),CloseSquare(1:11-1:12),OpenCurly(1:13-1:14),LowerIdent(1:15-1:17),OpColon(1:17-1:18),KwPlatform(1:19-1:27),StringStart(1:28-1:29),StringPart(1:29-1:50),StringEnd(1:50-1:51),CloseCurly(1:52-1:53),Newline(1:1-1:1),
diff --git a/src/snapshots/match_expr/basic_tag_union.md b/src/snapshots/match_expr/basic_tag_union.md
index f63a783084..cb0a21ec04 100644
--- a/src/snapshots/match_expr/basic_tag_union.md
+++ b/src/snapshots/match_expr/basic_tag_union.md
@@ -12,8 +12,12 @@ match color {
 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - basic_tag_union.md:1:7:1:12
+NIL
 # PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `color` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 **INCOMPATIBLE MATCH BRANCHES**
 The third branch's type in this `match` is different from the previous ones:
 **basic_tag_union.md:1:1:**
diff --git a/src/snapshots/match_expr/boolean_patterns.md b/src/snapshots/match_expr/boolean_patterns.md
index 3e1fc2a46a..cd534f91dc 100644
--- a/src/snapshots/match_expr/boolean_patterns.md
+++ b/src/snapshots/match_expr/boolean_patterns.md
@@ -11,9 +11,12 @@ match isReady {
 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - boolean_patterns.md:1:7:1:14
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `isReady` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:14),OpenCurly(1:15-1:16),Newline(1:1-1:1),
diff --git a/src/snapshots/match_expr/branch_scoping.md b/src/snapshots/match_expr/branch_scoping.md
index 4a3e6ad05a..4a1908369b 100644
--- a/src/snapshots/match_expr/branch_scoping.md
+++ b/src/snapshots/match_expr/branch_scoping.md
@@ -13,9 +13,12 @@ match result {
 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - branch_scoping.md:1:7:1:13
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `result` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:13),OpenCurly(1:14-1:15),Newline(1:1-1:1),
diff --git a/src/snapshots/match_expr/complex_list_tags.md b/src/snapshots/match_expr/complex_list_tags.md
index 23b4ec0479..4880fdbbac 100644
--- a/src/snapshots/match_expr/complex_list_tags.md
+++ b/src/snapshots/match_expr/complex_list_tags.md
@@ -15,17 +15,19 @@ match events {
 }
 ~~~
 # EXPECTED
-string_expected_close_interpolation - complex_list_tags.md:3:22:3:40
+PARSE ERROR - complex_list_tags.md:3:22:3:40
 UNEXPECTED TOKEN IN PATTERN - complex_list_tags.md:3:53:3:56
 UNEXPECTED TOKEN IN EXPRESSION - complex_list_tags.md:3:54:3:58
 UNEXPECTED TOKEN IN PATTERN - complex_list_tags.md:3:56:3:61
 UNEXPECTED TOKEN IN EXPRESSION - complex_list_tags.md:3:69:3:71
 UNEXPECTED TOKEN IN PATTERN - complex_list_tags.md:3:70:3:72
-string_expected_close_interpolation - complex_list_tags.md:4:36:4:41
+UNEXPECTED TOKEN IN EXPRESSION - complex_list_tags.md:3:71:3:71
+PARSE ERROR - complex_list_tags.md:4:36:4:41
 UNEXPECTED TOKEN IN PATTERN - complex_list_tags.md:4:83:4:85
 UNEXPECTED TOKEN IN EXPRESSION - complex_list_tags.md:4:84:4:97
 UNEXPECTED TOKEN IN PATTERN - complex_list_tags.md:4:85:4:98
-string_expected_close_interpolation - complex_list_tags.md:5:53:5:60
+UNEXPECTED TOKEN IN EXPRESSION - complex_list_tags.md:4:97:4:97
+PARSE ERROR - complex_list_tags.md:5:53:5:60
 UNEXPECTED TOKEN IN PATTERN - complex_list_tags.md:5:74:5:76
 UNEXPECTED TOKEN IN EXPRESSION - complex_list_tags.md:5:75:5:78
 UNEXPECTED TOKEN IN PATTERN - complex_list_tags.md:5:76:5:81
@@ -37,7 +39,8 @@ UNEXPECTED TOKEN IN EXPRESSION - complex_list_tags.md:5:113:5:116
 UNEXPECTED TOKEN IN PATTERN - complex_list_tags.md:5:114:5:119
 UNEXPECTED TOKEN IN EXPRESSION - complex_list_tags.md:5:129:5:130
 UNEXPECTED TOKEN IN PATTERN - complex_list_tags.md:5:130:5:131
-string_expected_close_interpolation - complex_list_tags.md:6:55:6:63
+UNEXPECTED TOKEN IN EXPRESSION - complex_list_tags.md:5:130:5:130
+PARSE ERROR - complex_list_tags.md:6:55:6:63
 UNEXPECTED TOKEN IN PATTERN - complex_list_tags.md:6:81:6:97
 UNEXPECTED TOKEN IN EXPRESSION - complex_list_tags.md:6:82:6:99
 UNEXPECTED TOKEN IN PATTERN - complex_list_tags.md:6:97:6:102
@@ -46,52 +49,28 @@ UNEXPECTED TOKEN IN PATTERN - complex_list_tags.md:6:111:6:114
 UNEXPECTED TOKEN IN EXPRESSION - complex_list_tags.md:6:112:6:117
 UNEXPECTED TOKEN IN PATTERN - complex_list_tags.md:6:125:6:126
 UNEXPECTED TOKEN IN EXPRESSION - complex_list_tags.md:6:126:6:127
+UNEXPECTED TOKEN IN PATTERN - complex_list_tags.md:6:126:6:126
 UNEXPECTED TOKEN IN EXPRESSION - complex_list_tags.md:1:1:7:6
-UNDEFINED VARIABLE - complex_list_tags.md:1:7:1:13
-expr_not_canonicalized - complex_list_tags.md:3:22:3:54
-UNUSED VARIABLE - complex_list_tags.md:3:15:3:16
+UNDEFINED VARIABLE - complex_list_tags.md:3:15:3:16
 UNUSED VARIABLE - complex_list_tags.md:3:12:3:13
-expr_not_canonicalized - complex_list_tags.md:3:54:3:58
-UNDEFINED VARIABLE - complex_list_tags.md:3:58:3:67
-expr_not_canonicalized - complex_list_tags.md:3:69:3:71
-UNUSED VARIABLE - complex_list_tags.md:3:68:3:69
-expr_not_canonicalized - complex_list_tags.md:4:36:4:74
-UNUSED VARIABLE - complex_list_tags.md:4:15:4:18
+INVALID PATTERN - complex_list_tags.md:3:68:3:69
+INVALID PATTERN - complex_list_tags.md:4:15:4:18
 UNUSED VARIABLE - complex_list_tags.md:4:27:4:31
-UNDEFINED VARIABLE - complex_list_tags.md:4:79:4:83
-UNUSED VARIABLE - complex_list_tags.md:4:70:4:78
-expr_not_canonicalized - complex_list_tags.md:4:84:4:97
-expr_not_canonicalized - complex_list_tags.md:5:53:5:75
-UNUSED VARIABLE - complex_list_tags.md:5:42:5:48
+UNDEFINED VARIABLE - complex_list_tags.md:4:70:4:78
+INVALID PATTERN - complex_list_tags.md:5:42:5:48
 UNUSED VARIABLE - complex_list_tags.md:5:30:5:33
 UNUSED VARIABLE - complex_list_tags.md:5:25:5:28
 UNUSED VARIABLE - complex_list_tags.md:5:11:5:13
 UNUSED VARIABLE - complex_list_tags.md:5:15:5:17
-expr_not_canonicalized - complex_list_tags.md:5:75:5:78
-UNDEFINED VARIABLE - complex_list_tags.md:5:78:5:87
-expr_not_canonicalized - complex_list_tags.md:5:90:5:97
-UNUSED VARIABLE - complex_list_tags.md:5:88:5:90
-expr_not_canonicalized - complex_list_tags.md:5:97:5:102
-UNDEFINED VARIABLE - complex_list_tags.md:5:109:5:112
-UNUSED VARIABLE - complex_list_tags.md:5:99:5:108
-expr_not_canonicalized - complex_list_tags.md:5:113:5:116
-UNDEFINED VARIABLE - complex_list_tags.md:5:116:5:125
-expr_not_canonicalized - complex_list_tags.md:5:129:5:130
-UNUSED VARIABLE - complex_list_tags.md:5:126:5:129
-expr_not_canonicalized - complex_list_tags.md:6:55:6:82
-UNUSED VARIABLE - complex_list_tags.md:6:41:6:50
+INVALID PATTERN - complex_list_tags.md:5:88:5:90
+INVALID PATTERN - complex_list_tags.md:5:99:5:108
+INVALID PATTERN - complex_list_tags.md:5:126:5:129
+INVALID PATTERN - complex_list_tags.md:6:41:6:50
 UNUSED VARIABLE - complex_list_tags.md:6:13:6:19
 UNUSED VARIABLE - complex_list_tags.md:6:31:6:32
 UNUSED VARIABLE - complex_list_tags.md:6:28:6:29
-expr_not_canonicalized - complex_list_tags.md:6:82:6:99
-UNDEFINED VARIABLE - complex_list_tags.md:6:99:6:108
-expr_not_canonicalized - complex_list_tags.md:6:110:6:112
-UNUSED VARIABLE - complex_list_tags.md:6:109:6:110
-expr_not_canonicalized - complex_list_tags.md:6:112:6:117
-UNDEFINED VARIABLE - complex_list_tags.md:6:124:6:125
-UNUSED VARIABLE - complex_list_tags.md:6:114:6:123
-expr_not_canonicalized - complex_list_tags.md:6:126:6:127
-expr_not_canonicalized - complex_list_tags.md:1:1:7:6
+INVALID PATTERN - complex_list_tags.md:6:109:6:110
+INVALID PATTERN - complex_list_tags.md:6:114:6:123
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `string_expected_close_interpolation`
@@ -536,6 +515,406 @@ match events {
 ```
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `events` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**UNUSED VARIABLE**
+Variable ``y`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_y` to suppress this warning.
+The unused variable is declared here:
+**complex_list_tags.md:3:15:3:16:**
+```roc
+    [Click(x, y)] => "single click at (${Num.toStr x}, ${Num.toStr y})"
+```
+              ^
+
+
+**UNUSED VARIABLE**
+Variable ``x`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_x` to suppress this warning.
+The unused variable is declared here:
+**complex_list_tags.md:3:12:3:13:**
+```roc
+    [Click(x, y)] => "single click at (${Num.toStr x}, ${Num.toStr y})"
+```
+           ^
+
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNDEFINED VARIABLE**
+Nothing is named `toStr` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**UNUSED VARIABLE**
+Variable ``y`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_y` to suppress this warning.
+The unused variable is declared here:
+**complex_list_tags.md:3:68:3:69:**
+```roc
+    [Click(x, y)] => "single click at (${Num.toStr x}, ${Num.toStr y})"
+```
+                                                                   ^
+
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**UNUSED VARIABLE**
+Variable ``key`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_key` to suppress this warning.
+The unused variable is declared here:
+**complex_list_tags.md:4:15:4:18:**
+```roc
+    [KeyPress(key), .. as rest] => "key ${key} pressed, ${Num.toStr (List.len rest)} more events"
+```
+              ^^^
+
+
+**UNUSED VARIABLE**
+Variable ``rest`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_rest` to suppress this warning.
+The unused variable is declared here:
+**complex_list_tags.md:4:27:4:31:**
+```roc
+    [KeyPress(key), .. as rest] => "key ${key} pressed, ${Num.toStr (List.len rest)} more events"
+```
+                          ^^^^
+
+
+**UNDEFINED VARIABLE**
+Nothing is named `rest` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNUSED VARIABLE**
+Variable ``len`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_len` to suppress this warning.
+The unused variable is declared here:
+**complex_list_tags.md:4:70:4:78:**
+```roc
+    [KeyPress(key), .. as rest] => "key ${key} pressed, ${Num.toStr (List.len rest)} more events"
+```
+                                                                     ^^^^^^^^
+
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**UNUSED VARIABLE**
+Variable ``others`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_others` to suppress this warning.
+The unused variable is declared here:
+**complex_list_tags.md:5:42:5:48:**
+```roc
+    [Move(dx, dy), Move(dx2, dy2), .. as others] => "moved ${Num.toStr dx},${Num.toStr dy} then ${Num.toStr dx2},${Num.toStr dy2}"
+```
+                                         ^^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``dy2`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_dy2` to suppress this warning.
+The unused variable is declared here:
+**complex_list_tags.md:5:30:5:33:**
+```roc
+    [Move(dx, dy), Move(dx2, dy2), .. as others] => "moved ${Num.toStr dx},${Num.toStr dy} then ${Num.toStr dx2},${Num.toStr dy2}"
+```
+                             ^^^
+
+
+**UNUSED VARIABLE**
+Variable ``dx2`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_dx2` to suppress this warning.
+The unused variable is declared here:
+**complex_list_tags.md:5:25:5:28:**
+```roc
+    [Move(dx, dy), Move(dx2, dy2), .. as others] => "moved ${Num.toStr dx},${Num.toStr dy} then ${Num.toStr dx2},${Num.toStr dy2}"
+```
+                        ^^^
+
+
+**UNUSED VARIABLE**
+Variable ``dx`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_dx` to suppress this warning.
+The unused variable is declared here:
+**complex_list_tags.md:5:11:5:13:**
+```roc
+    [Move(dx, dy), Move(dx2, dy2), .. as others] => "moved ${Num.toStr dx},${Num.toStr dy} then ${Num.toStr dx2},${Num.toStr dy2}"
+```
+          ^^
+
+
+**UNUSED VARIABLE**
+Variable ``dy`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_dy` to suppress this warning.
+The unused variable is declared here:
+**complex_list_tags.md:5:15:5:17:**
+```roc
+    [Move(dx, dy), Move(dx2, dy2), .. as others] => "moved ${Num.toStr dx},${Num.toStr dy} then ${Num.toStr dx2},${Num.toStr dy2}"
+```
+              ^^
+
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNDEFINED VARIABLE**
+Nothing is named `toStr` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**UNUSED VARIABLE**
+Variable ``dy`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_dy` to suppress this warning.
+The unused variable is declared here:
+**complex_list_tags.md:5:88:5:90:**
+```roc
+    [Move(dx, dy), Move(dx2, dy2), .. as others] => "moved ${Num.toStr dx},${Num.toStr dy} then ${Num.toStr dx2},${Num.toStr dy2}"
+```
+                                                                                       ^^
+
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**UNDEFINED VARIABLE**
+Nothing is named `dx2` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNUSED VARIABLE**
+Variable ``toStr`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_toStr` to suppress this warning.
+The unused variable is declared here:
+**complex_list_tags.md:5:99:5:108:**
+```roc
+    [Move(dx, dy), Move(dx2, dy2), .. as others] => "moved ${Num.toStr dx},${Num.toStr dy} then ${Num.toStr dx2},${Num.toStr dy2}"
+```
+                                                                                                  ^^^^^^^^^
+
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNDEFINED VARIABLE**
+Nothing is named `toStr` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**UNUSED VARIABLE**
+Variable ``dy2`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_dy2` to suppress this warning.
+The unused variable is declared here:
+**complex_list_tags.md:5:126:5:129:**
+```roc
+    [Move(dx, dy), Move(dx2, dy2), .. as others] => "moved ${Num.toStr dx},${Num.toStr dy} then ${Num.toStr dx2},${Num.toStr dy2}"
+```
+                                                                                                                             ^^^
+
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**UNUSED VARIABLE**
+Variable ``remaining`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_remaining` to suppress this warning.
+The unused variable is declared here:
+**complex_list_tags.md:6:41:6:50:**
+```roc
+    [Scroll(amount), Click(x, y), .. as remaining] => "scroll ${Num.toStr amount} then click at ${Num.toStr x},${Num.toStr y}"
+```
+                                        ^^^^^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``amount`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_amount` to suppress this warning.
+The unused variable is declared here:
+**complex_list_tags.md:6:13:6:19:**
+```roc
+    [Scroll(amount), Click(x, y), .. as remaining] => "scroll ${Num.toStr amount} then click at ${Num.toStr x},${Num.toStr y}"
+```
+            ^^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``y`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_y` to suppress this warning.
+The unused variable is declared here:
+**complex_list_tags.md:6:31:6:32:**
+```roc
+    [Scroll(amount), Click(x, y), .. as remaining] => "scroll ${Num.toStr amount} then click at ${Num.toStr x},${Num.toStr y}"
+```
+                              ^
+
+
+**UNUSED VARIABLE**
+Variable ``x`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_x` to suppress this warning.
+The unused variable is declared here:
+**complex_list_tags.md:6:28:6:29:**
+```roc
+    [Scroll(amount), Click(x, y), .. as remaining] => "scroll ${Num.toStr amount} then click at ${Num.toStr x},${Num.toStr y}"
+```
+                           ^
+
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNDEFINED VARIABLE**
+Nothing is named `toStr` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**UNUSED VARIABLE**
+Variable ``x`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_x` to suppress this warning.
+The unused variable is declared here:
+**complex_list_tags.md:6:109:6:110:**
+```roc
+    [Scroll(amount), Click(x, y), .. as remaining] => "scroll ${Num.toStr amount} then click at ${Num.toStr x},${Num.toStr y}"
+```
+                                                                                                            ^
+
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**UNDEFINED VARIABLE**
+Nothing is named `y` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNUSED VARIABLE**
+Variable ``toStr`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_toStr` to suppress this warning.
+The unused variable is declared here:
+**complex_list_tags.md:6:114:6:123:**
+```roc
+    [Scroll(amount), Click(x, y), .. as remaining] => "scroll ${Num.toStr amount} then click at ${Num.toStr x},${Num.toStr y}"
+```
+                                                                                                                 ^^^^^^^^^
+
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:13),OpenCurly(1:14-1:15),Newline(1:1-1:1),
diff --git a/src/snapshots/match_expr/f64_pattern_literal_error.md b/src/snapshots/match_expr/f64_pattern_literal_error.md
index 7b4ed3b7e4..b682f46006 100644
--- a/src/snapshots/match_expr/f64_pattern_literal_error.md
+++ b/src/snapshots/match_expr/f64_pattern_literal_error.md
@@ -14,8 +14,7 @@ match x {
 # EXPECTED
 UNEXPECTED TOKEN IN PATTERN - f64_pattern_literal_error.md:2:5:2:15
 UNEXPECTED TOKEN IN PATTERN - f64_pattern_literal_error.md:3:5:3:14
-UNDEFINED VARIABLE - f64_pattern_literal_error.md:1:7:1:8
-UNUSED VARIABLE - f64_pattern_literal_error.md:4:5:4:10
+UNDEFINED VARIABLE - f64_pattern_literal_error.md:4:5:4:10
 # PROBLEMS
 **UNEXPECTED TOKEN IN PATTERN**
 The token **3.14f64 =>** is not expected in a pattern.
@@ -41,6 +40,28 @@ Here is the problematic code:
     ^^^^^^^^^
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNUSED VARIABLE**
+Variable ``value`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_value` to suppress this warning.
+The unused variable is declared here:
+**f64_pattern_literal_error.md:4:5:4:10:**
+```roc
+    value => "other"
+```
+    ^^^^^
+
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:8),OpenCurly(1:9-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/match_expr/guards_1.md b/src/snapshots/match_expr/guards_1.md
index f7483d79ba..a27ea49144 100644
--- a/src/snapshots/match_expr/guards_1.md
+++ b/src/snapshots/match_expr/guards_1.md
@@ -13,34 +13,25 @@ match value {
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - guards_1.md:2:16:2:20
-no_else - guards_1.md:2:19:2:30
+PARSE ERROR - guards_1.md:2:19:2:30
 UNEXPECTED TOKEN IN PATTERN - guards_1.md:2:20:2:32
 UNEXPECTED TOKEN IN EXPRESSION - guards_1.md:2:30:2:35
 UNEXPECTED TOKEN IN PATTERN - guards_1.md:2:43:2:44
 UNEXPECTED TOKEN IN EXPRESSION - guards_1.md:2:44:2:45
+UNEXPECTED TOKEN IN PATTERN - guards_1.md:2:44:2:44
 UNEXPECTED TOKEN IN EXPRESSION - guards_1.md:1:1:3:6
 UNEXPECTED TOKEN IN EXPRESSION - guards_1.md:3:16:3:20
-no_else - guards_1.md:3:19:3:30
+PARSE ERROR - guards_1.md:3:19:3:30
 UNEXPECTED TOKEN IN PATTERN - guards_1.md:3:20:3:32
 UNEXPECTED TOKEN IN EXPRESSION - guards_1.md:3:30:3:35
 UNEXPECTED TOKEN IN PATTERN - guards_1.md:3:43:3:44
 UNEXPECTED TOKEN IN EXPRESSION - guards_1.md:3:44:3:45
+UNEXPECTED TOKEN IN PATTERN - guards_1.md:3:44:3:44
 UNEXPECTED TOKEN IN EXPRESSION - guards_1.md:1:1:4:6
-UNDEFINED VARIABLE - guards_1.md:1:7:1:12
-expr_not_canonicalized - guards_1.md:2:19:2:30
-UNUSED VARIABLE - guards_1.md:2:5:2:6
-expr_not_canonicalized - guards_1.md:2:30:2:35
-UNDEFINED VARIABLE - guards_1.md:2:42:2:43
-UNUSED VARIABLE - guards_1.md:2:32:2:41
-expr_not_canonicalized - guards_1.md:2:44:2:45
-expr_not_canonicalized - guards_1.md:1:1:3:6
-expr_not_canonicalized - guards_1.md:3:19:3:30
-UNUSED VARIABLE - guards_1.md:3:5:3:6
-expr_not_canonicalized - guards_1.md:3:30:3:35
-UNDEFINED VARIABLE - guards_1.md:3:42:3:43
-UNUSED VARIABLE - guards_1.md:3:32:3:41
-expr_not_canonicalized - guards_1.md:3:44:3:45
-expr_not_canonicalized - guards_1.md:1:1:4:6
+UNDEFINED VARIABLE - guards_1.md:2:5:2:6
+INVALID PATTERN - guards_1.md:2:32:2:41
+INVALID PATTERN - guards_1.md:3:5:3:6
+INVALID PATTERN - guards_1.md:3:32:3:41
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **=> "** is not expected in an expression.
@@ -242,6 +233,116 @@ match value {
 ```
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `value` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**UNUSED VARIABLE**
+Variable ``x`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_x` to suppress this warning.
+The unused variable is declared here:
+**guards_1.md:2:5:2:6:**
+```roc
+    x if x > 0 => "positive: ${Num.toStr x}"
+```
+    ^
+
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNUSED VARIABLE**
+Variable ``toStr`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_toStr` to suppress this warning.
+The unused variable is declared here:
+**guards_1.md:2:32:2:41:**
+```roc
+    x if x > 0 => "positive: ${Num.toStr x}"
+```
+                               ^^^^^^^^^
+
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**UNUSED VARIABLE**
+Variable ``x`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_x` to suppress this warning.
+The unused variable is declared here:
+**guards_1.md:3:5:3:6:**
+```roc
+    x if x < 0 => "negative: ${Num.toStr x}"
+```
+    ^
+
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNUSED VARIABLE**
+Variable ``toStr`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_toStr` to suppress this warning.
+The unused variable is declared here:
+**guards_1.md:3:32:3:41:**
+```roc
+    x if x < 0 => "negative: ${Num.toStr x}"
+```
+                               ^^^^^^^^^
+
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:12),OpenCurly(1:13-1:14),Newline(1:1-1:1),
diff --git a/src/snapshots/match_expr/guards_2.md b/src/snapshots/match_expr/guards_2.md
index e1d068796c..357e709ef7 100644
--- a/src/snapshots/match_expr/guards_2.md
+++ b/src/snapshots/match_expr/guards_2.md
@@ -13,36 +13,27 @@ match value {
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - guards_2.md:2:47:2:51
-no_else - guards_2.md:2:50:2:75
+PARSE ERROR - guards_2.md:2:50:2:75
 UNEXPECTED TOKEN IN PATTERN - guards_2.md:2:51:2:77
 UNEXPECTED TOKEN IN EXPRESSION - guards_2.md:2:75:2:80
 UNEXPECTED TOKEN IN PATTERN - guards_2.md:2:92:2:93
 UNEXPECTED TOKEN IN EXPRESSION - guards_2.md:2:93:2:94
+UNEXPECTED TOKEN IN PATTERN - guards_2.md:2:93:2:93
 UNEXPECTED TOKEN IN EXPRESSION - guards_2.md:1:1:3:6
 UNEXPECTED TOKEN IN EXPRESSION - guards_2.md:3:22:3:26
-no_else - guards_2.md:3:25:3:48
+PARSE ERROR - guards_2.md:3:25:3:48
 UNEXPECTED TOKEN IN PATTERN - guards_2.md:3:26:3:50
 UNEXPECTED TOKEN IN EXPRESSION - guards_2.md:3:48:3:53
 UNEXPECTED TOKEN IN PATTERN - guards_2.md:3:61:3:62
 UNEXPECTED TOKEN IN EXPRESSION - guards_2.md:3:62:3:63
+UNEXPECTED TOKEN IN PATTERN - guards_2.md:3:62:3:62
 UNEXPECTED TOKEN IN EXPRESSION - guards_2.md:1:1:4:6
-UNDEFINED VARIABLE - guards_2.md:1:7:1:12
-expr_not_canonicalized - guards_2.md:2:50:2:75
-UNUSED VARIABLE - guards_2.md:2:6:2:11
+UNDEFINED VARIABLE - guards_2.md:2:6:2:11
 UNUSED VARIABLE - guards_2.md:2:19:2:23
-expr_not_canonicalized - guards_2.md:2:75:2:80
-UNDEFINED VARIABLE - guards_2.md:2:87:2:92
-UNUSED VARIABLE - guards_2.md:2:77:2:86
-expr_not_canonicalized - guards_2.md:2:93:2:94
-expr_not_canonicalized - guards_2.md:1:1:3:6
-expr_not_canonicalized - guards_2.md:3:25:3:48
-UNUSED VARIABLE - guards_2.md:3:6:3:7
+INVALID PATTERN - guards_2.md:2:77:2:86
+INVALID PATTERN - guards_2.md:3:6:3:7
 UNUSED VARIABLE - guards_2.md:3:9:3:10
-expr_not_canonicalized - guards_2.md:3:48:3:53
-UNDEFINED VARIABLE - guards_2.md:3:60:3:61
-UNUSED VARIABLE - guards_2.md:3:50:3:59
-expr_not_canonicalized - guards_2.md:3:62:3:63
-expr_not_canonicalized - guards_2.md:1:1:4:6
+INVALID PATTERN - guards_2.md:3:50:3:59
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **=> "** is not expected in an expression.
@@ -244,6 +235,140 @@ match value {
 ```
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `value` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**UNUSED VARIABLE**
+Variable ``first`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_first` to suppress this warning.
+The unused variable is declared here:
+**guards_2.md:2:6:2:11:**
+```roc
+    [first, .. as rest] if List.len(rest) > 5 => "long list starting with ${Num.toStr first}"
+```
+     ^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``rest`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_rest` to suppress this warning.
+The unused variable is declared here:
+**guards_2.md:2:19:2:23:**
+```roc
+    [first, .. as rest] if List.len(rest) > 5 => "long list starting with ${Num.toStr first}"
+```
+                  ^^^^
+
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**UNDEFINED VARIABLE**
+Nothing is named `first` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNUSED VARIABLE**
+Variable ``toStr`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_toStr` to suppress this warning.
+The unused variable is declared here:
+**guards_2.md:2:77:2:86:**
+```roc
+    [first, .. as rest] if List.len(rest) > 5 => "long list starting with ${Num.toStr first}"
+```
+                                                                            ^^^^^^^^^
+
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**UNUSED VARIABLE**
+Variable ``x`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_x` to suppress this warning.
+The unused variable is declared here:
+**guards_2.md:3:6:3:7:**
+```roc
+    [x, y] if x == y => "pair of equal values: ${Num.toStr x}"
+```
+     ^
+
+
+**UNUSED VARIABLE**
+Variable ``y`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_y` to suppress this warning.
+The unused variable is declared here:
+**guards_2.md:3:9:3:10:**
+```roc
+    [x, y] if x == y => "pair of equal values: ${Num.toStr x}"
+```
+        ^
+
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNUSED VARIABLE**
+Variable ``toStr`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_toStr` to suppress this warning.
+The unused variable is declared here:
+**guards_2.md:3:50:3:59:**
+```roc
+    [x, y] if x == y => "pair of equal values: ${Num.toStr x}"
+```
+                                                 ^^^^^^^^^
+
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:12),OpenCurly(1:13-1:14),Newline(1:1-1:1),
diff --git a/src/snapshots/match_expr/list_destructure_scoping.md b/src/snapshots/match_expr/list_destructure_scoping.md
index 20973fa380..61f1338dd4 100644
--- a/src/snapshots/match_expr/list_destructure_scoping.md
+++ b/src/snapshots/match_expr/list_destructure_scoping.md
@@ -11,9 +11,12 @@ match list {
 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - list_destructure_scoping.md:1:7:1:11
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `list` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:11),OpenCurly(1:12-1:13),Newline(1:1-1:1),
diff --git a/src/snapshots/match_expr/list_destructure_variations.md b/src/snapshots/match_expr/list_destructure_variations.md
index abc3afa55a..7bec6bda11 100644
--- a/src/snapshots/match_expr/list_destructure_variations.md
+++ b/src/snapshots/match_expr/list_destructure_variations.md
@@ -15,12 +15,50 @@ match list {
 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - list_destructure_variations.md:1:7:1:11
-UNUSED VARIABLE - list_destructure_variations.md:5:18:5:22
+UNDEFINED VARIABLE - list_destructure_variations.md:5:18:5:22
 UNUSED VARIABLE - list_destructure_variations.md:6:22:6:26
 UNUSED VARIABLE - list_destructure_variations.md:7:21:7:25
 # PROBLEMS
-NIL
+**UNDEFINED VARIABLE**
+Nothing is named `list` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNUSED VARIABLE**
+Variable ``tail`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_tail` to suppress this warning.
+The unused variable is declared here:
+**list_destructure_variations.md:5:18:5:22:**
+```roc
+    [head, .. as tail] => head
+```
+                 ^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``rest`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_rest` to suppress this warning.
+The unused variable is declared here:
+**list_destructure_variations.md:6:22:6:26:**
+```roc
+    [One, Two, .. as rest] => 3
+```
+                     ^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``more`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_more` to suppress this warning.
+The unused variable is declared here:
+**list_destructure_variations.md:7:21:7:25:**
+```roc
+    [x, y, z, .. as more] => x + y + z
+```
+                    ^^^^
+
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:11),OpenCurly(1:12-1:13),Newline(1:1-1:1),
diff --git a/src/snapshots/match_expr/list_mixed_literals.md b/src/snapshots/match_expr/list_mixed_literals.md
index 1611f384c6..7dc01ff82e 100644
--- a/src/snapshots/match_expr/list_mixed_literals.md
+++ b/src/snapshots/match_expr/list_mixed_literals.md
@@ -14,9 +14,12 @@ match sequence {
 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - list_mixed_literals.md:1:7:1:15
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `sequence` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:15),OpenCurly(1:16-1:17),Newline(1:1-1:1),
diff --git a/src/snapshots/match_expr/list_patterns.md b/src/snapshots/match_expr/list_patterns.md
index a039c1ebff..5cff8636da 100644
--- a/src/snapshots/match_expr/list_patterns.md
+++ b/src/snapshots/match_expr/list_patterns.md
@@ -11,10 +11,8 @@ match numbers {
 }
 ~~~
 # EXPECTED
-pattern_list_rest_old_syntax - list_patterns.md:3:13:3:19
-UNDEFINED VARIABLE - list_patterns.md:1:7:1:14
-UNDEFINED VARIABLE - list_patterns.md:2:11:2:14
-UNUSED VARIABLE - list_patterns.md:3:15:3:19
+BAD LIST REST PATTERN SYNTAX - list_patterns.md:3:13:3:19
+UNDEFINED VARIABLE - list_patterns.md:3:15:3:19
 UNUSED VARIABLE - list_patterns.md:3:6:3:11
 # PROBLEMS
 **BAD LIST REST PATTERN SYNTAX**
@@ -29,6 +27,38 @@ Here is the problematic code:
             ^^^^^^
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `numbers` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `acc` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNUSED VARIABLE**
+Variable ``rest`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_rest` to suppress this warning.
+The unused variable is declared here:
+**list_patterns.md:3:15:3:19:**
+```roc
+    [first, ..rest] => 0 # invalid rest pattern should error
+```
+              ^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``first`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_first` to suppress this warning.
+The unused variable is declared here:
+**list_patterns.md:3:6:3:11:**
+```roc
+    [first, ..rest] => 0 # invalid rest pattern should error
+```
+     ^^^^^
+
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:14),OpenCurly(1:15-1:16),Newline(1:1-1:1),
diff --git a/src/snapshots/match_expr/list_patterns_err_multiple_rest.md b/src/snapshots/match_expr/list_patterns_err_multiple_rest.md
index 6cc93f266d..1ea97d697e 100644
--- a/src/snapshots/match_expr/list_patterns_err_multiple_rest.md
+++ b/src/snapshots/match_expr/list_patterns_err_multiple_rest.md
@@ -10,11 +10,31 @@ match numbers {
 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - list_patterns_err_multiple_rest.md:1:7:1:14
-not_implemented - list_patterns_err_multiple_rest.md:2:25:2:28
-UNUSED VARIABLE - list_patterns_err_multiple_rest.md:2:10:2:16
+UNDEFINED VARIABLE - list_patterns_err_multiple_rest.md:2:10:2:16
 # PROBLEMS
-NIL
+**UNDEFINED VARIABLE**
+Nothing is named `numbers` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: ...
+Let us know if you want to help!
+
+**UNUSED VARIABLE**
+Variable ``middle`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_middle` to suppress this warning.
+The unused variable is declared here:
+**list_patterns_err_multiple_rest.md:2:10:2:16:**
+```roc
+    [.., middle, ..] => ... # error, multiple rest patterns not allowed
+```
+         ^^^^^^
+
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:14),OpenCurly(1:15-1:16),Newline(1:1-1:1),
diff --git a/src/snapshots/match_expr/list_rest_invalid.md b/src/snapshots/match_expr/list_rest_invalid.md
index 8b395bd553..e5ad945858 100644
--- a/src/snapshots/match_expr/list_rest_invalid.md
+++ b/src/snapshots/match_expr/list_rest_invalid.md
@@ -12,11 +12,10 @@ match items {
 }
 ~~~
 # EXPECTED
-pattern_list_rest_old_syntax - list_rest_invalid.md:2:13:2:19
-pattern_list_rest_old_syntax - list_rest_invalid.md:3:6:3:12
-pattern_list_rest_old_syntax - list_rest_invalid.md:4:9:4:15
-UNDEFINED VARIABLE - list_rest_invalid.md:1:7:1:12
-UNUSED VARIABLE - list_rest_invalid.md:2:6:2:11
+BAD LIST REST PATTERN SYNTAX - list_rest_invalid.md:2:13:2:19
+BAD LIST REST PATTERN SYNTAX - list_rest_invalid.md:3:6:3:12
+BAD LIST REST PATTERN SYNTAX - list_rest_invalid.md:4:9:4:15
+UNDEFINED VARIABLE - list_rest_invalid.md:2:6:2:11
 UNUSED VARIABLE - list_rest_invalid.md:2:15:2:19
 UNUSED VARIABLE - list_rest_invalid.md:3:8:3:12
 UNUSED VARIABLE - list_rest_invalid.md:3:14:3:18
@@ -60,6 +59,94 @@ Here is the problematic code:
         ^^^^^^
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `items` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNUSED VARIABLE**
+Variable ``first`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_first` to suppress this warning.
+The unused variable is declared here:
+**list_rest_invalid.md:2:6:2:11:**
+```roc
+    [first, ..rest] => 0 # invalid rest pattern should error
+```
+     ^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``rest`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_rest` to suppress this warning.
+The unused variable is declared here:
+**list_rest_invalid.md:2:15:2:19:**
+```roc
+    [first, ..rest] => 0 # invalid rest pattern should error
+```
+              ^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``rest`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_rest` to suppress this warning.
+The unused variable is declared here:
+**list_rest_invalid.md:3:8:3:12:**
+```roc
+    [..rest, last] => 1 # invalid rest pattern should error
+```
+       ^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``last`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_last` to suppress this warning.
+The unused variable is declared here:
+**list_rest_invalid.md:3:14:3:18:**
+```roc
+    [..rest, last] => 1 # invalid rest pattern should error
+```
+             ^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``rest`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_rest` to suppress this warning.
+The unused variable is declared here:
+**list_rest_invalid.md:4:11:4:15:**
+```roc
+    [x, ..rest, y] => 2 # invalid rest pattern should error
+```
+          ^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``x`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_x` to suppress this warning.
+The unused variable is declared here:
+**list_rest_invalid.md:4:6:4:7:**
+```roc
+    [x, ..rest, y] => 2 # invalid rest pattern should error
+```
+     ^
+
+
+**UNUSED VARIABLE**
+Variable ``y`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_y` to suppress this warning.
+The unused variable is declared here:
+**list_rest_invalid.md:4:17:4:18:**
+```roc
+    [x, ..rest, y] => 2 # invalid rest pattern should error
+```
+                ^
+
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:12),OpenCurly(1:13-1:14),Newline(1:1-1:1),
diff --git a/src/snapshots/match_expr/list_rest_scoping.md b/src/snapshots/match_expr/list_rest_scoping.md
index 3bbbc6f2ee..0013f6c8de 100644
--- a/src/snapshots/match_expr/list_rest_scoping.md
+++ b/src/snapshots/match_expr/list_rest_scoping.md
@@ -12,11 +12,10 @@ match items {
 }
 ~~~
 # EXPECTED
-pattern_list_rest_old_syntax - list_rest_scoping.md:2:13:2:19
-pattern_list_rest_old_syntax - list_rest_scoping.md:3:6:3:12
-pattern_list_rest_old_syntax - list_rest_scoping.md:4:9:4:15
-UNDEFINED VARIABLE - list_rest_scoping.md:1:7:1:12
-UNUSED VARIABLE - list_rest_scoping.md:2:15:2:19
+BAD LIST REST PATTERN SYNTAX - list_rest_scoping.md:2:13:2:19
+BAD LIST REST PATTERN SYNTAX - list_rest_scoping.md:3:6:3:12
+BAD LIST REST PATTERN SYNTAX - list_rest_scoping.md:4:9:4:15
+UNDEFINED VARIABLE - list_rest_scoping.md:2:15:2:19
 UNUSED VARIABLE - list_rest_scoping.md:3:8:3:12
 UNUSED VARIABLE - list_rest_scoping.md:4:11:4:15
 # PROBLEMS
@@ -56,6 +55,46 @@ Here is the problematic code:
         ^^^^^^
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `items` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNUSED VARIABLE**
+Variable ``rest`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_rest` to suppress this warning.
+The unused variable is declared here:
+**list_rest_scoping.md:2:15:2:19:**
+```roc
+    [first, ..rest] => first + 1
+```
+              ^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``rest`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_rest` to suppress this warning.
+The unused variable is declared here:
+**list_rest_scoping.md:3:8:3:12:**
+```roc
+    [..rest, last] => last + 2
+```
+       ^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``rest`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_rest` to suppress this warning.
+The unused variable is declared here:
+**list_rest_scoping.md:4:11:4:15:**
+```roc
+    [x, ..rest, y] => x + y
+```
+          ^^^^
+
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:12),OpenCurly(1:13-1:14),Newline(1:1-1:1),
diff --git a/src/snapshots/match_expr/list_rest_scoping_variables.md b/src/snapshots/match_expr/list_rest_scoping_variables.md
index bca2247237..e096fb5cd5 100644
--- a/src/snapshots/match_expr/list_rest_scoping_variables.md
+++ b/src/snapshots/match_expr/list_rest_scoping_variables.md
@@ -13,12 +13,11 @@ match data {
 }
 ~~~
 # EXPECTED
-pattern_list_rest_old_syntax - list_rest_scoping_variables.md:2:6:2:13
-pattern_list_rest_old_syntax - list_rest_scoping_variables.md:3:13:3:20
-pattern_list_rest_old_syntax - list_rest_scoping_variables.md:4:6:4:13
-pattern_list_rest_old_syntax - list_rest_scoping_variables.md:5:13:5:20
-UNDEFINED VARIABLE - list_rest_scoping_variables.md:1:7:1:11
-UNUSED VARIABLE - list_rest_scoping_variables.md:2:8:2:13
+BAD LIST REST PATTERN SYNTAX - list_rest_scoping_variables.md:2:6:2:13
+BAD LIST REST PATTERN SYNTAX - list_rest_scoping_variables.md:3:13:3:20
+BAD LIST REST PATTERN SYNTAX - list_rest_scoping_variables.md:4:6:4:13
+BAD LIST REST PATTERN SYNTAX - list_rest_scoping_variables.md:5:13:5:20
+UNDEFINED VARIABLE - list_rest_scoping_variables.md:2:8:2:13
 UNUSED VARIABLE - list_rest_scoping_variables.md:3:15:3:20
 UNUSED VARIABLE - list_rest_scoping_variables.md:4:8:4:13
 UNUSED VARIABLE - list_rest_scoping_variables.md:5:15:5:20
@@ -71,6 +70,58 @@ Here is the problematic code:
             ^^^^^^^
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `data` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNUSED VARIABLE**
+Variable ``items`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_items` to suppress this warning.
+The unused variable is declared here:
+**list_rest_scoping_variables.md:2:8:2:13:**
+```roc
+    [..items] => 1
+```
+       ^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``items`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_items` to suppress this warning.
+The unused variable is declared here:
+**list_rest_scoping_variables.md:3:15:3:20:**
+```roc
+    [first, ..items] => first
+```
+              ^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``items`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_items` to suppress this warning.
+The unused variable is declared here:
+**list_rest_scoping_variables.md:4:8:4:13:**
+```roc
+    [..items, last] => last
+```
+       ^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``items`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_items` to suppress this warning.
+The unused variable is declared here:
+**list_rest_scoping_variables.md:5:15:5:20:**
+```roc
+    [first, ..items, last] => first + last
+```
+              ^^^^^
+
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:11),OpenCurly(1:12-1:13),Newline(1:1-1:1),
diff --git a/src/snapshots/match_expr/list_underscore_patterns.md b/src/snapshots/match_expr/list_underscore_patterns.md
index 86fa224561..c35ca09ee9 100644
--- a/src/snapshots/match_expr/list_underscore_patterns.md
+++ b/src/snapshots/match_expr/list_underscore_patterns.md
@@ -15,9 +15,12 @@ match items {
 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - list_underscore_patterns.md:1:7:1:12
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `items` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:12),OpenCurly(1:13-1:14),Newline(1:1-1:1),
diff --git a/src/snapshots/match_expr/middle_rest.md b/src/snapshots/match_expr/middle_rest.md
index e491091937..1c058739e7 100644
--- a/src/snapshots/match_expr/middle_rest.md
+++ b/src/snapshots/match_expr/middle_rest.md
@@ -13,10 +13,24 @@ match items {
 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - middle_rest.md:1:7:1:12
-UNUSED VARIABLE - middle_rest.md:3:18:3:24
+UNDEFINED VARIABLE - middle_rest.md:3:18:3:24
 # PROBLEMS
-NIL
+**UNDEFINED VARIABLE**
+Nothing is named `items` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNUSED VARIABLE**
+Variable ``middle`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_middle` to suppress this warning.
+The unused variable is declared here:
+**middle_rest.md:3:18:3:24:**
+```roc
+    [a, b, .. as middle, x, y] => a + b + x + y  
+```
+                 ^^^^^^
+
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:12),OpenCurly(1:13-1:14),Newline(1:1-1:1),
diff --git a/src/snapshots/match_expr/mixed_pattern_scoping.md b/src/snapshots/match_expr/mixed_pattern_scoping.md
index e8d72fb857..b5a57af980 100644
--- a/src/snapshots/match_expr/mixed_pattern_scoping.md
+++ b/src/snapshots/match_expr/mixed_pattern_scoping.md
@@ -13,9 +13,12 @@ match data {
 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - mixed_pattern_scoping.md:1:7:1:11
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `data` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:11),OpenCurly(1:12-1:13),Newline(1:1-1:1),
diff --git a/src/snapshots/match_expr/multi_pattern_branch.md b/src/snapshots/match_expr/multi_pattern_branch.md
index ed264bd287..861e4ec202 100644
--- a/src/snapshots/match_expr/multi_pattern_branch.md
+++ b/src/snapshots/match_expr/multi_pattern_branch.md
@@ -12,10 +12,16 @@ match color {
 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - multi_pattern_branch.md:1:7:1:12
-not_implemented - multi_pattern_branch.md:1:1:1:1
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `color` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize alternatives pattern
+Let us know if you want to help!
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:12),OpenCurly(1:13-1:14),Newline(1:1-1:1),
diff --git a/src/snapshots/match_expr/nested_list_scoping.md b/src/snapshots/match_expr/nested_list_scoping.md
index 4b7b426198..4ea8117c25 100644
--- a/src/snapshots/match_expr/nested_list_scoping.md
+++ b/src/snapshots/match_expr/nested_list_scoping.md
@@ -12,9 +12,12 @@ match nestedList {
 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - nested_list_scoping.md:1:7:1:17
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `nestedList` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:17),OpenCurly(1:18-1:19),Newline(1:1-1:1),
diff --git a/src/snapshots/match_expr/nested_patterns.md b/src/snapshots/match_expr/nested_patterns.md
index f3c6fc27d1..db62a8a4ed 100644
--- a/src/snapshots/match_expr/nested_patterns.md
+++ b/src/snapshots/match_expr/nested_patterns.md
@@ -13,14 +13,32 @@ match data {
 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - nested_patterns.md:1:7:1:11
-not_implemented - nested_patterns.md:2:17:2:48
-UNDEFINED VARIABLE - nested_patterns.md:2:53:2:54
-UNDEFINED VARIABLE - nested_patterns.md:2:57:2:65
-UNDEFINED VARIABLE - nested_patterns.md:2:66:2:70
-not_implemented - nested_patterns.md:3:17:3:28
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `data` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: record pattern with sub-patterns
+Let us know if you want to help!
+
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `len` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `rest` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: record pattern with sub-patterns
+Let us know if you want to help!
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:11),OpenCurly(1:12-1:13),Newline(1:1-1:1),
diff --git a/src/snapshots/match_expr/record_destructure.md b/src/snapshots/match_expr/record_destructure.md
index 49e55add45..8364efceed 100644
--- a/src/snapshots/match_expr/record_destructure.md
+++ b/src/snapshots/match_expr/record_destructure.md
@@ -12,13 +12,45 @@ match person {
 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - record_destructure.md:1:7:1:13
-UNUSED VARIABLE - record_destructure.md:2:13:2:18
-not_implemented - record_destructure.md:3:13:3:32
-UNDEFINED VARIABLE - record_destructure.md:3:36:3:40
-UNUSED VARIABLE - record_destructure.md:3:7:3:12
+UNDEFINED VARIABLE - record_destructure.md:2:13:2:18
+NOT IMPLEMENTED - record_destructure.md:3:7:3:12
 # PROBLEMS
-NIL
+**UNDEFINED VARIABLE**
+Nothing is named `person` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNUSED VARIABLE**
+Variable ``age`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_age` to suppress this warning.
+The unused variable is declared here:
+**record_destructure.md:2:13:2:18:**
+```roc
+    { name, age } => name
+```
+            ^^^^^
+
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: record pattern with sub-patterns
+Let us know if you want to help!
+
+**UNDEFINED VARIABLE**
+Nothing is named `city` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNUSED VARIABLE**
+Variable ``name`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_name` to suppress this warning.
+The unused variable is declared here:
+**record_destructure.md:3:7:3:12:**
+```roc
+    { name, address: { city } } => city
+```
+      ^^^^^
+
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:13),OpenCurly(1:14-1:15),Newline(1:1-1:1),
diff --git a/src/snapshots/match_expr/simple_record.md b/src/snapshots/match_expr/simple_record.md
index cacf8a94b8..275d8d6372 100644
--- a/src/snapshots/match_expr/simple_record.md
+++ b/src/snapshots/match_expr/simple_record.md
@@ -11,9 +11,12 @@ match person {
 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - simple_record.md:1:7:1:13
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `person` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:13),OpenCurly(1:14-1:15),Newline(1:1-1:1),
diff --git a/src/snapshots/match_expr/single_branch.md b/src/snapshots/match_expr/single_branch.md
index 51b9ae6631..e491cd3abf 100644
--- a/src/snapshots/match_expr/single_branch.md
+++ b/src/snapshots/match_expr/single_branch.md
@@ -10,9 +10,12 @@ match value {
 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - single_branch.md:1:7:1:12
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `value` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:12),OpenCurly(1:13-1:14),Newline(1:1-1:1),
diff --git a/src/snapshots/match_expr/tag_with_payload.md b/src/snapshots/match_expr/tag_with_payload.md
index 7f7aae0f11..88e3db8225 100644
--- a/src/snapshots/match_expr/tag_with_payload.md
+++ b/src/snapshots/match_expr/tag_with_payload.md
@@ -12,9 +12,12 @@ match shape {
 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - tag_with_payload.md:1:7:1:12
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `shape` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:12),OpenCurly(1:13-1:14),Newline(1:1-1:1),
diff --git a/src/snapshots/match_expr/tuple_patterns.md b/src/snapshots/match_expr/tuple_patterns.md
index 1c14f82920..f4d6576684 100644
--- a/src/snapshots/match_expr/tuple_patterns.md
+++ b/src/snapshots/match_expr/tuple_patterns.md
@@ -13,10 +13,24 @@ match coord {
 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - tuple_patterns.md:1:7:1:12
-UNUSED VARIABLE - tuple_patterns.md:5:9:5:10
+UNDEFINED VARIABLE - tuple_patterns.md:5:9:5:10
 # PROBLEMS
-NIL
+**UNDEFINED VARIABLE**
+Nothing is named `coord` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNUSED VARIABLE**
+Variable ``y`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_y` to suppress this warning.
+The unused variable is declared here:
+**tuple_patterns.md:5:9:5:10:**
+```roc
+    (x, y) => x
+```
+        ^
+
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:12),OpenCurly(1:13-1:14),Newline(1:1-1:1),
diff --git a/src/snapshots/match_expr/variable_shadowing.md b/src/snapshots/match_expr/variable_shadowing.md
index 2aa936ebb6..06b260dc84 100644
--- a/src/snapshots/match_expr/variable_shadowing.md
+++ b/src/snapshots/match_expr/variable_shadowing.md
@@ -11,10 +11,16 @@ match (value, other) {
 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - variable_shadowing.md:1:8:1:13
-UNDEFINED VARIABLE - variable_shadowing.md:1:15:1:20
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `value` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `other` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),OpenRound(1:7-1:8),LowerIdent(1:8-1:13),Comma(1:13-1:14),LowerIdent(1:15-1:20),CloseRound(1:20-1:21),OpenCurly(1:22-1:23),Newline(1:1-1:1),
diff --git a/src/snapshots/match_expr/wildcard_patterns.md b/src/snapshots/match_expr/wildcard_patterns.md
index 049329270c..1676a946e9 100644
--- a/src/snapshots/match_expr/wildcard_patterns.md
+++ b/src/snapshots/match_expr/wildcard_patterns.md
@@ -12,10 +12,24 @@ match value {
 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - wildcard_patterns.md:1:7:1:12
-UNUSED VARIABLE - wildcard_patterns.md:4:5:4:10
+UNDEFINED VARIABLE - wildcard_patterns.md:4:5:4:10
 # PROBLEMS
-NIL
+**UNDEFINED VARIABLE**
+Nothing is named `value` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNUSED VARIABLE**
+Variable ``other`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_other` to suppress this warning.
+The unused variable is declared here:
+**wildcard_patterns.md:4:5:4:10:**
+```roc
+    other => "something else"
+```
+    ^^^^^
+
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:12),OpenCurly(1:13-1:14),Newline(1:1-1:1),
diff --git a/src/snapshots/multi_qualified_import.md b/src/snapshots/multi_qualified_import.md
index 4e6b530304..6298897a73 100644
--- a/src/snapshots/multi_qualified_import.md
+++ b/src/snapshots/multi_qualified_import.md
@@ -27,18 +27,19 @@ UNEXPECTED TOKEN IN EXPRESSION - multi_qualified_import.md:9:15:9:25
 UNEXPECTED TOKEN IN EXPRESSION - multi_qualified_import.md:9:20:9:33
 UNEXPECTED TOKEN IN EXPRESSION - multi_qualified_import.md:9:25:9:36
 UNEXPECTED TOKEN IN EXPRESSION - multi_qualified_import.md:9:34:9:40
+PARSE ERROR - multi_qualified_import.md:9:37:9:37
 UNEXPECTED TOKEN IN EXPRESSION - multi_qualified_import.md:10:9:10:12
 UNEXPECTED TOKEN IN EXPRESSION - multi_qualified_import.md:10:11:10:19
-expr_arrow_expects_ident - multi_qualified_import.md:10:23:10:34
+PARSE ERROR - multi_qualified_import.md:10:23:10:34
 UNEXPECTED TOKEN IN EXPRESSION - multi_qualified_import.md:10:24:10:35
+UNEXPECTED TOKEN IN EXPRESSION - multi_qualified_import.md:10:34:10:34
 UNEXPECTED TOKEN IN EXPRESSION - multi_qualified_import.md:13:12:13:22
 UNEXPECTED TOKEN IN EXPRESSION - multi_qualified_import.md:13:17:13:34
+UNEXPECTED TOKEN IN EXPRESSION - multi_qualified_import.md:13:22:13:22
 UNEXPECTED TOKEN IN EXPRESSION - multi_qualified_import.md:14:12:14:22
 UNEXPECTED TOKEN IN EXPRESSION - multi_qualified_import.md:14:17:14:29
 UNEXPECTED TOKEN IN EXPRESSION - multi_qualified_import.md:14:22:14:31
-UNDECLARED TYPE - multi_qualified_import.md:5:16:5:23
-UNDEFINED VARIABLE - multi_qualified_import.md:6:16:6:45
-UNDEFINED VARIABLE - multi_qualified_import.md:14:8:14:12
+INVALID STATEMENT - multi_qualified_import.md:5:16:5:23
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **.Utf8 exposing** is not expected in an expression.
@@ -268,6 +269,101 @@ data = json.Core.Utf8.encode "hello"
                      ^^^^^^^^^
 
 
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**UNDECLARED TYPE**
+The type ``Encoder`` is not declared in this scope.
+
+This type is referenced here:
+**multi_qualified_import.md:5:16:5:23:**
+```roc
+json_encoder : Encoder
+```
+               ^^^^^^^
+
+
+**UNDEFINED VARIABLE**
+Nothing is named `defaultEncoder` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**UNDEFINED VARIABLE**
+Nothing is named `json` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 # TOKENS
 ~~~zig
 KwModule(1:1-1:7),OpenSquare(1:8-1:9),LowerIdent(1:9-1:21),CloseSquare(1:21-1:22),Newline(1:1-1:1),
diff --git a/src/snapshots/nominal/nominal_external_fully_qualified.md b/src/snapshots/nominal/nominal_external_fully_qualified.md
index b6d79010b7..66e7f1cc1c 100644
--- a/src/snapshots/nominal/nominal_external_fully_qualified.md
+++ b/src/snapshots/nominal/nominal_external_fully_qualified.md
@@ -21,7 +21,29 @@ handleResult = |result| {
 UNDECLARED TYPE - nominal_external_fully_qualified.md:6:1:6:13
 UNUSED VARIABLE - nominal_external_fully_qualified.md:9:41:9:45
 # PROBLEMS
-NIL
+**UNDECLARED TYPE**
+The type ``MyResultModule.MyResultType`` is not declared in this scope.
+
+This type is referenced here:
+**nominal_external_fully_qualified.md:6:1:6:13:**
+```roc
+handleResult = |result| {
+```
+^^^^^^^^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``code`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_code` to suppress this warning.
+The unused variable is declared here:
+**nominal_external_fully_qualified.md:9:41:9:45:**
+```roc
+        MyResultModule.MyResultType.Err(code) => "Error: $(code.toStr())"
+```
+                                        ^^^^
+
+
 # TOKENS
 ~~~zig
 KwModule(1:1-1:7),OpenSquare(1:8-1:9),LowerIdent(1:9-1:21),CloseSquare(1:21-1:22),Newline(1:1-1:1),
diff --git a/src/snapshots/nominal/nominal_import_long_package.md b/src/snapshots/nominal/nominal_import_long_package.md
index 327b3457a3..c0fa7015f7 100644
--- a/src/snapshots/nominal/nominal_import_long_package.md
+++ b/src/snapshots/nominal/nominal_import_long_package.md
@@ -15,8 +15,8 @@ red = ... # not implemented
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - nominal_import_long_package.md:3:21:3:36
 UNEXPECTED TOKEN IN EXPRESSION - nominal_import_long_package.md:3:28:3:38
-UNDECLARED TYPE - nominal_import_long_package.md:5:7:5:9
-not_implemented - nominal_import_long_package.md:6:7:6:10
+LIST NOT CLOSED - nominal_import_long_package.md:3:51:3:51
+INVALID STATEMENT - nominal_import_long_package.md:5:7:5:9
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **.Color exposing** is not expected in an expression.
@@ -55,6 +55,33 @@ import design.Styles.Color exposing [Encoder as CE]
                                                   
 
 
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**UNDECLARED TYPE**
+The type ``CE`` is not declared in this scope.
+
+This type is referenced here:
+**nominal_import_long_package.md:5:7:5:9:**
+```roc
+red : CE
+```
+      ^^
+
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: ...
+Let us know if you want to help!
+
 # TOKENS
 ~~~zig
 KwModule(1:1-1:7),OpenSquare(1:8-1:9),LowerIdent(1:9-1:12),CloseSquare(1:12-1:13),Newline(1:1-1:1),
diff --git a/src/snapshots/nominal/nominal_import_wildcard.md b/src/snapshots/nominal/nominal_import_wildcard.md
index 46bfc88e15..728bfb92f7 100644
--- a/src/snapshots/nominal/nominal_import_wildcard.md
+++ b/src/snapshots/nominal/nominal_import_wildcard.md
@@ -19,7 +19,8 @@ green : Color
 green = Green
 ~~~
 # EXPECTED
-UNDECLARED TYPE - nominal_import_wildcard.md:5:7:5:12
+UNEXPECTED TOKEN IN EXPRESSION - nominal_import_wildcard.md:3:13:3:13
+INVALID STATEMENT - nominal_import_wildcard.md:5:7:5:12
 UNDECLARED TYPE - nominal_import_wildcard.md:8:8:8:13
 UNDECLARED TYPE - nominal_import_wildcard.md:11:9:11:14
 # PROBLEMS
@@ -35,6 +36,43 @@ import Color.*
             
 
 
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**UNDECLARED TYPE**
+The type ``Color`` is not declared in this scope.
+
+This type is referenced here:
+**nominal_import_wildcard.md:5:7:5:12:**
+```roc
+red : Color
+```
+      ^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Color`` is not declared in this scope.
+
+This type is referenced here:
+**nominal_import_wildcard.md:8:8:8:13:**
+```roc
+blue : Color
+```
+       ^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Color`` is not declared in this scope.
+
+This type is referenced here:
+**nominal_import_wildcard.md:11:9:11:14:**
+```roc
+green : Color
+```
+        ^^^^^
+
+
 # TOKENS
 ~~~zig
 KwModule(1:1-1:7),OpenSquare(1:8-1:9),LowerIdent(1:9-1:12),Comma(1:12-1:13),LowerIdent(1:14-1:19),Comma(1:19-1:20),LowerIdent(1:21-1:25),CloseSquare(1:25-1:26),Newline(1:1-1:1),
diff --git a/src/snapshots/nominal/nominal_mixed_scope.md b/src/snapshots/nominal/nominal_mixed_scope.md
index 5241ad3749..2b8269ec33 100644
--- a/src/snapshots/nominal/nominal_mixed_scope.md
+++ b/src/snapshots/nominal/nominal_mixed_scope.md
@@ -23,8 +23,7 @@ processColor = |color| {
 }
 ~~~
 # EXPECTED
-import_must_be_top_level - nominal_mixed_scope.md:9:5:9:17
-not_implemented - nominal_mixed_scope.md:1:1:1:1
+IMPORT MUST BE TOP LEVEL - nominal_mixed_scope.md:9:5:9:17
 # PROBLEMS
 **IMPORT MUST BE TOP LEVEL**
 Import statements must appear at the top level of a module.
@@ -38,6 +37,10 @@ Here is the problematic code:
     ^^^^^^^^^^^^
 
 
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: statement type in block
+Let us know if you want to help!
+
 # TOKENS
 ~~~zig
 KwModule(1:1-1:7),OpenSquare(1:8-1:9),UpperIdent(1:9-1:20),Comma(1:20-1:21),LowerIdent(1:22-1:34),CloseSquare(1:34-1:35),Newline(1:1-1:1),
diff --git a/src/snapshots/numbers.md b/src/snapshots/numbers.md
index a3d7840462..6600bd2d44 100644
--- a/src/snapshots/numbers.md
+++ b/src/snapshots/numbers.md
@@ -20,9 +20,7 @@ type=expr
 )
 ~~~
 # EXPECTED
-UppercaseBase - numbers.md:2:6:2:6
-UppercaseBase - numbers.md:4:6:4:6
-UppercaseBase - numbers.md:6:6:6:6
+NIL
 # PROBLEMS
 **UPPERCASE BASE**
 Number base prefixes must be lowercase (0x, 0o, 0b).
diff --git a/src/snapshots/old_syntax/add_var_with_spaces.md b/src/snapshots/old_syntax/add_var_with_spaces.md
index 403493e023..87054ecab5 100644
--- a/src/snapshots/old_syntax/add_var_with_spaces.md
+++ b/src/snapshots/old_syntax/add_var_with_spaces.md
@@ -8,9 +8,12 @@ type=expr
 x + 2
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - add_var_with_spaces.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpPlus(1:3-1:4),Int(1:5-1:6),EndOfFile(1:6-1:6),
diff --git a/src/snapshots/old_syntax/alias_or_opaque_fail.md b/src/snapshots/old_syntax/alias_or_opaque_fail.md
index d880193619..bdff813501 100644
--- a/src/snapshots/old_syntax/alias_or_opaque_fail.md
+++ b/src/snapshots/old_syntax/alias_or_opaque_fail.md
@@ -10,7 +10,7 @@ type=expr
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - alias_or_opaque_fail.md:1:2:1:4
-expected_expr_close_round_or_comma - alias_or_opaque_fail.md:2:4:2:4
+PARSE ERROR - alias_or_opaque_fail.md:2:4:2:4
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **@,** is not expected in an expression.
diff --git a/src/snapshots/old_syntax/all_the_bangs.md b/src/snapshots/old_syntax/all_the_bangs.md
index 5cd5158351..b8bf98f5a5 100644
--- a/src/snapshots/old_syntax/all_the_bangs.md
+++ b/src/snapshots/old_syntax/all_the_bangs.md
@@ -10,9 +10,12 @@ p
 .p!!
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - all_the_bangs.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `p` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/ann_closed_union.md b/src/snapshots/old_syntax/ann_closed_union.md
index 6809aad378..1f1bc40b40 100644
--- a/src/snapshots/old_syntax/ann_closed_union.md
+++ b/src/snapshots/old_syntax/ann_closed_union.md
@@ -13,9 +13,9 @@ type=expr
 }
 ~~~
 # EXPECTED
-expected_ty_close_square_or_comma - ann_closed_union.md:2:26:2:32
-MALFORMED TYPE - ann_closed_union.md:2:26:2:32
-UNUSED VARIABLE - ann_closed_union.md:3:5:3:8
+PARSE ERROR - ann_closed_union.md:2:26:2:32
+UNEXPECTED TOKEN IN EXPRESSION - ann_closed_union.md:2:31:2:31
+MALFORMED TYPE - ann_closed_union.md:3:5:3:8
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `expected_ty_close_square_or_comma`
@@ -41,6 +41,21 @@ Here is the problematic code:
                               
 
 
+**MALFORMED TYPE**
+This type annotation is malformed or contains invalid syntax.
+
+**UNUSED VARIABLE**
+Variable ``foo`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_foo` to suppress this warning.
+The unused variable is declared here:
+**ann_closed_union.md:3:5:3:8:**
+```roc
+    foo = True
+```
+    ^^^
+
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/ann_effectful_fn.md b/src/snapshots/old_syntax/ann_effectful_fn.md
index 7efb0c8a84..c53a208d24 100644
--- a/src/snapshots/old_syntax/ann_effectful_fn.md
+++ b/src/snapshots/old_syntax/ann_effectful_fn.md
@@ -14,8 +14,12 @@ type=expr
 }
 ~~~
 # EXPECTED
-# PROBLEMS
 NIL
+# PROBLEMS
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: crash statement
+Let us know if you want to help!
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/ann_parens_comments.md b/src/snapshots/old_syntax/ann_parens_comments.md
index d40beac0e7..09c9c0e1fc 100644
--- a/src/snapshots/old_syntax/ann_parens_comments.md
+++ b/src/snapshots/old_syntax/ann_parens_comments.md
@@ -13,9 +13,12 @@ r
 h
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - ann_parens_comments.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `r` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:2-1:3),NoSpaceOpenRound(1:3-1:4),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/ann_parens_where_implements_func.md b/src/snapshots/old_syntax/ann_parens_where_implements_func.md
index fb93f85130..f5e59bf09d 100644
--- a/src/snapshots/old_syntax/ann_parens_where_implements_func.md
+++ b/src/snapshots/old_syntax/ann_parens_where_implements_func.md
@@ -12,9 +12,12 @@ implements K->Z)
 s
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - ann_parens_where_implements_func.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:2-1:3),NoSpaceOpenRound(1:3-1:4),LowerIdent(1:4-1:5),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/ann_record_pat_with_comment.md b/src/snapshots/old_syntax/ann_record_pat_with_comment.md
index 9d09acf039..67f11bba5b 100644
--- a/src/snapshots/old_syntax/ann_record_pat_with_comment.md
+++ b/src/snapshots/old_syntax/ann_record_pat_with_comment.md
@@ -10,9 +10,12 @@ type=expr
 o
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - ann_record_pat_with_comment.md:2:2:2:3
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `s` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),LowerIdent(1:2-1:3),Newline(1:4-1:4),
diff --git a/src/snapshots/old_syntax/ann_tag_union_newline_comment.md b/src/snapshots/old_syntax/ann_tag_union_newline_comment.md
index cb47d203f3..802e324678 100644
--- a/src/snapshots/old_syntax/ann_tag_union_newline_comment.md
+++ b/src/snapshots/old_syntax/ann_tag_union_newline_comment.md
@@ -11,9 +11,12 @@ k:
 D
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - ann_tag_union_newline_comment.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `k` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:2-1:3),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/annotated_record_destructure.md b/src/snapshots/old_syntax/annotated_record_destructure.md
index a53bb60069..4b3c4be993 100644
--- a/src/snapshots/old_syntax/annotated_record_destructure.md
+++ b/src/snapshots/old_syntax/annotated_record_destructure.md
@@ -11,10 +11,16 @@ type=expr
 x
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - annotated_record_destructure.md:1:3:1:5
-UNDEFINED VARIABLE - annotated_record_destructure.md:1:6:1:9
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `y` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),LowerIdent(1:3-1:4),Comma(1:4-1:5),LowerIdent(1:6-1:7),CloseCurly(1:8-1:9),OpColon(1:10-1:11),UpperIdent(1:12-1:15),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/annotated_tuple_destructure.md b/src/snapshots/old_syntax/annotated_tuple_destructure.md
index a72cbb9e25..afeaac72fd 100644
--- a/src/snapshots/old_syntax/annotated_tuple_destructure.md
+++ b/src/snapshots/old_syntax/annotated_tuple_destructure.md
@@ -11,10 +11,16 @@ type=expr
 x
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - annotated_tuple_destructure.md:1:3:1:4
-UNDEFINED VARIABLE - annotated_tuple_destructure.md:1:6:1:7
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `y` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenRound(1:1-1:2),LowerIdent(1:3-1:4),Comma(1:4-1:5),LowerIdent(1:6-1:7),CloseRound(1:8-1:9),OpColon(1:10-1:11),UpperIdent(1:12-1:15),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/annotation_comment_before_as.md b/src/snapshots/old_syntax/annotation_comment_before_as.md
index 2abcd1f23f..702beaae3d 100644
--- a/src/snapshots/old_syntax/annotation_comment_before_as.md
+++ b/src/snapshots/old_syntax/annotation_comment_before_as.md
@@ -10,9 +10,12 @@ e:A#
 n
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - annotation_comment_before_as.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `e` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:2-1:3),UpperIdent(1:3-1:4),Newline(1:5-1:5),
diff --git a/src/snapshots/old_syntax/annotation_double_as.md b/src/snapshots/old_syntax/annotation_double_as.md
index eb5497f6c3..beb07ea8a5 100644
--- a/src/snapshots/old_syntax/annotation_double_as.md
+++ b/src/snapshots/old_syntax/annotation_double_as.md
@@ -9,9 +9,12 @@ s:(e as A)as A
 s
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - annotation_double_as.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `s` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:2-1:3),NoSpaceOpenRound(1:3-1:4),LowerIdent(1:4-1:5),KwAs(1:6-1:8),UpperIdent(1:9-1:10),CloseRound(1:10-1:11),KwAs(1:11-1:13),UpperIdent(1:14-1:15),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/annotation_tag_parens_comment.md b/src/snapshots/old_syntax/annotation_tag_parens_comment.md
index 0df9e865d0..7409ff620d 100644
--- a/src/snapshots/old_syntax/annotation_tag_parens_comment.md
+++ b/src/snapshots/old_syntax/annotation_tag_parens_comment.md
@@ -10,9 +10,12 @@ g:[T(T#
 D
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - annotation_tag_parens_comment.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `g` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:2-1:3),OpenSquare(1:3-1:4),UpperIdent(1:4-1:5),NoSpaceOpenRound(1:5-1:6),UpperIdent(1:6-1:7),Newline(1:8-1:8),
diff --git a/src/snapshots/old_syntax/annotation_tuple_newline.md b/src/snapshots/old_syntax/annotation_tuple_newline.md
index 23bb6c67d8..16817d0a3a 100644
--- a/src/snapshots/old_syntax/annotation_tuple_newline.md
+++ b/src/snapshots/old_syntax/annotation_tuple_newline.md
@@ -10,9 +10,12 @@ d:(J,
 2
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - annotation_tuple_newline.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `d` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:2-1:3),NoSpaceOpenRound(1:3-1:4),UpperIdent(1:4-1:5),Comma(1:5-1:6),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/annotation_tuple_parens_newlines.md b/src/snapshots/old_syntax/annotation_tuple_parens_newlines.md
index a0989b77b0..a5a91e4b54 100644
--- a/src/snapshots/old_syntax/annotation_tuple_parens_newlines.md
+++ b/src/snapshots/old_syntax/annotation_tuple_parens_newlines.md
@@ -11,9 +11,12 @@ i)
 {}
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - annotation_tuple_parens_newlines.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `p` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:2-1:3),NoSpaceOpenRound(1:3-1:4),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/applies_in_binop.md b/src/snapshots/old_syntax/applies_in_binop.md
index 49c4e80a02..73761fab38 100644
--- a/src/snapshots/old_syntax/applies_in_binop.md
+++ b/src/snapshots/old_syntax/applies_in_binop.md
@@ -10,9 +10,12 @@ Str.getUnsafe haystack haystackIndex
 Str.getUnsafe needle needleIndex
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - applies_in_binop.md:1:1:1:14
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `getUnsafe` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 UpperIdent(1:1-1:4),NoSpaceDotLowerIdent(1:4-1:14),LowerIdent(1:15-1:23),LowerIdent(1:24-1:37),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/apply_binop_switch.md b/src/snapshots/old_syntax/apply_binop_switch.md
index 5cbc09fd1e..92b1d9f016 100644
--- a/src/snapshots/old_syntax/apply_binop_switch.md
+++ b/src/snapshots/old_syntax/apply_binop_switch.md
@@ -9,9 +9,12 @@ i<2
 (-6)
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - apply_binop_switch.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `i` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpLessThan(1:2-1:3),Int(1:3-1:4),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/apply_closure_pizza.md b/src/snapshots/old_syntax/apply_closure_pizza.md
index 9cbc3699c9..0709c4eb47 100644
--- a/src/snapshots/old_syntax/apply_closure_pizza.md
+++ b/src/snapshots/old_syntax/apply_closure_pizza.md
@@ -9,9 +9,12 @@ foo
 |> Dict.keepIf \(k, _v) -> List.contains keysToDelete k |> Bool.not
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - apply_closure_pizza.md:1:1:1:4
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `foo` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:4),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/apply_record_ann.md b/src/snapshots/old_syntax/apply_record_ann.md
index 7f4998c2fa..479e0d4034 100644
--- a/src/snapshots/old_syntax/apply_record_ann.md
+++ b/src/snapshots/old_syntax/apply_record_ann.md
@@ -10,9 +10,12 @@ a:N{h,
 g
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - apply_record_ann.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `a` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:2-1:3),UpperIdent(1:3-1:4),OpenCurly(1:4-1:5),LowerIdent(1:5-1:6),Comma(1:6-1:7),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/apply_three_args.md b/src/snapshots/old_syntax/apply_three_args.md
index 213f92149d..531d96f692 100644
--- a/src/snapshots/old_syntax/apply_three_args.md
+++ b/src/snapshots/old_syntax/apply_three_args.md
@@ -8,9 +8,12 @@ type=expr
 a b c d
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - apply_three_args.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `a` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),LowerIdent(1:3-1:4),LowerIdent(1:5-1:6),LowerIdent(1:7-1:8),EndOfFile(1:8-1:8),
diff --git a/src/snapshots/old_syntax/apply_tuple_ext_parens_ty.md b/src/snapshots/old_syntax/apply_tuple_ext_parens_ty.md
index 3bc3475753..1a162a89dc 100644
--- a/src/snapshots/old_syntax/apply_tuple_ext_parens_ty.md
+++ b/src/snapshots/old_syntax/apply_tuple_ext_parens_ty.md
@@ -9,9 +9,12 @@ i:M()(Y) c
 t
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - apply_tuple_ext_parens_ty.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `i` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:2-1:3),UpperIdent(1:3-1:4),NoSpaceOpenRound(1:4-1:5),CloseRound(1:5-1:6),NoSpaceOpenRound(1:6-1:7),UpperIdent(1:7-1:8),CloseRound(1:8-1:9),LowerIdent(1:10-1:11),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/apply_two_args.md b/src/snapshots/old_syntax/apply_two_args.md
index 225b405631..c5c29d2778 100644
--- a/src/snapshots/old_syntax/apply_two_args.md
+++ b/src/snapshots/old_syntax/apply_two_args.md
@@ -8,9 +8,12 @@ type=expr
 whee  12  34
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - apply_two_args.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `whee` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),Int(1:7-1:9),Int(1:11-1:13),EndOfFile(1:13-1:13),
diff --git a/src/snapshots/old_syntax/apply_two_args_pnc.md b/src/snapshots/old_syntax/apply_two_args_pnc.md
index 67e27f753a..05cd38c1b6 100644
--- a/src/snapshots/old_syntax/apply_two_args_pnc.md
+++ b/src/snapshots/old_syntax/apply_two_args_pnc.md
@@ -8,9 +8,12 @@ type=expr
 whee(12,  34)
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - apply_two_args_pnc.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `whee` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),NoSpaceOpenRound(1:5-1:6),Int(1:6-1:8),Comma(1:8-1:9),Int(1:11-1:13),CloseRound(1:13-1:14),EndOfFile(1:14-1:14),
diff --git a/src/snapshots/old_syntax/as_in_func_type_args.md b/src/snapshots/old_syntax/as_in_func_type_args.md
index 8d3311cedf..fc00fca85c 100644
--- a/src/snapshots/old_syntax/as_in_func_type_args.md
+++ b/src/snapshots/old_syntax/as_in_func_type_args.md
@@ -10,9 +10,12 @@ e:J
 r
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - as_in_func_type_args.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `e` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:2-1:3),UpperIdent(1:3-1:4),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/assign_parens_item_newline_comment.md b/src/snapshots/old_syntax/assign_parens_item_newline_comment.md
index 127c43e73a..3a191acdca 100644
--- a/src/snapshots/old_syntax/assign_parens_item_newline_comment.md
+++ b/src/snapshots/old_syntax/assign_parens_item_newline_comment.md
@@ -12,9 +12,12 @@ i
 r
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - assign_parens_item_newline_comment.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `a` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpAssign(1:2-1:3),NoSpaceOpenRound(1:3-1:4),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/backslash_closure_last_expr.md b/src/snapshots/old_syntax/backslash_closure_last_expr.md
index ff7c9a7a98..2d72ea94bc 100644
--- a/src/snapshots/old_syntax/backslash_closure_last_expr.md
+++ b/src/snapshots/old_syntax/backslash_closure_last_expr.md
@@ -9,9 +9,12 @@ b
 \e->s
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - backslash_closure_last_expr.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `b` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/basic_apply.md b/src/snapshots/old_syntax/basic_apply.md
index 11f694fffa..cbb23c350f 100644
--- a/src/snapshots/old_syntax/basic_apply.md
+++ b/src/snapshots/old_syntax/basic_apply.md
@@ -8,9 +8,12 @@ type=expr
 whee 1
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - basic_apply.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `whee` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),Int(1:6-1:7),EndOfFile(1:7-1:7),
diff --git a/src/snapshots/old_syntax/basic_field.md b/src/snapshots/old_syntax/basic_field.md
index bafdc7092d..7273baf6b1 100644
--- a/src/snapshots/old_syntax/basic_field.md
+++ b/src/snapshots/old_syntax/basic_field.md
@@ -8,9 +8,12 @@ type=expr
 rec.field
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - basic_field.md:1:1:1:4
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `rec` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:4),NoSpaceDotLowerIdent(1:4-1:10),EndOfFile(1:10-1:10),
diff --git a/src/snapshots/old_syntax/basic_var.md b/src/snapshots/old_syntax/basic_var.md
index 94c72be14d..8896f4ca2b 100644
--- a/src/snapshots/old_syntax/basic_var.md
+++ b/src/snapshots/old_syntax/basic_var.md
@@ -8,9 +8,12 @@ type=expr
 whee
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - basic_var.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `whee` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),EndOfFile(1:5-1:5),
diff --git a/src/snapshots/old_syntax/binop_apply_complex.md b/src/snapshots/old_syntax/binop_apply_complex.md
index 34e53bf503..f58659f01a 100644
--- a/src/snapshots/old_syntax/binop_apply_complex.md
+++ b/src/snapshots/old_syntax/binop_apply_complex.md
@@ -8,9 +8,12 @@ type=expr
 N<l (r*N)
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - binop_apply_complex.md:1:3:1:4
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `l` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 UpperIdent(1:1-1:2),OpLessThan(1:2-1:3),LowerIdent(1:3-1:4),OpenRound(1:5-1:6),LowerIdent(1:6-1:7),OpStar(1:7-1:8),UpperIdent(1:8-1:9),CloseRound(1:9-1:10),EndOfFile(1:10-1:10),
diff --git a/src/snapshots/old_syntax/binop_assign_defs_nested.md b/src/snapshots/old_syntax/binop_assign_defs_nested.md
index 067cb7e3a7..08d75b31ac 100644
--- a/src/snapshots/old_syntax/binop_assign_defs_nested.md
+++ b/src/snapshots/old_syntax/binop_assign_defs_nested.md
@@ -10,7 +10,7 @@ r))
 1))
 ~~~
 # EXPECTED
-expected_expr_close_round_or_comma - binop_assign_defs_nested.md:2:2:2:4
+PARSE ERROR - binop_assign_defs_nested.md:2:2:2:4
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `expected_expr_close_round_or_comma`
@@ -24,6 +24,9 @@ r))
  ^^
 
 
+**INVALID TUPLE ELEMENT**
+This tuple element is malformed or contains invalid syntax.
+
 # TOKENS
 ~~~zig
 Int(1:1-1:2),OpBinaryMinus(1:2-1:3),NoSpaceOpenRound(1:3-1:4),NoSpaceOpenRound(1:4-1:5),LowerIdent(1:5-1:6),OpAssign(1:6-1:7),NoSpaceOpenRound(1:7-1:8),NoSpaceOpenRound(1:8-1:9),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/binop_closure_apply.md b/src/snapshots/old_syntax/binop_closure_apply.md
index 42ab57493b..4e6050876f 100644
--- a/src/snapshots/old_syntax/binop_closure_apply.md
+++ b/src/snapshots/old_syntax/binop_closure_apply.md
@@ -11,8 +11,6 @@ d+
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - binop_closure_apply.md:2:2:2:4
-UNDEFINED VARIABLE - binop_closure_apply.md:1:1:1:2
-expr_not_canonicalized - binop_closure_apply.md:1:1:2:4
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **\w** is not expected in an expression.
@@ -26,6 +24,14 @@ Here is the problematic code:
  ^^
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `d` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpPlus(1:2-1:3),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/binops_comment_indent_change.md b/src/snapshots/old_syntax/binops_comment_indent_change.md
index 00649b7e09..0c1ac82355 100644
--- a/src/snapshots/old_syntax/binops_comment_indent_change.md
+++ b/src/snapshots/old_syntax/binops_comment_indent_change.md
@@ -11,9 +11,12 @@ r^
  -P
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - binops_comment_indent_change.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `r` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpCaret(1:2-1:3),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/body_block_string_apply_string.md b/src/snapshots/old_syntax/body_block_string_apply_string.md
index a39df0f317..0a5d4aa9ab 100644
--- a/src/snapshots/old_syntax/body_block_string_apply_string.md
+++ b/src/snapshots/old_syntax/body_block_string_apply_string.md
@@ -9,9 +9,12 @@ t="""" """""
 S
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - body_block_string_apply_string.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `t` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpAssign(1:2-1:3),MultilineStringStart(1:3-1:6),StringPart(1:6-1:8),MultilineStringEnd(1:8-1:11),StringStart(1:11-1:12),StringPart(1:12-1:12),StringEnd(1:12-1:13),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/body_with_unneeded_parens.md b/src/snapshots/old_syntax/body_with_unneeded_parens.md
index 5e0581601c..50b642a723 100644
--- a/src/snapshots/old_syntax/body_with_unneeded_parens.md
+++ b/src/snapshots/old_syntax/body_with_unneeded_parens.md
@@ -10,9 +10,12 @@ a=(
 a
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - body_with_unneeded_parens.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `a` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpAssign(1:2-1:3),NoSpaceOpenRound(1:3-1:4),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/bound_variable.md b/src/snapshots/old_syntax/bound_variable.md
index 326af82fa6..5f87b6bf33 100644
--- a/src/snapshots/old_syntax/bound_variable.md
+++ b/src/snapshots/old_syntax/bound_variable.md
@@ -9,9 +9,12 @@ a:
 c 0
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - bound_variable.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `a` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:2-1:3),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/call_bang.md b/src/snapshots/old_syntax/call_bang.md
index 081e96a20a..4b1233c6b5 100644
--- a/src/snapshots/old_syntax/call_bang.md
+++ b/src/snapshots/old_syntax/call_bang.md
@@ -8,9 +8,12 @@ type=expr
 launchTheNukes! 123
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - call_bang.md:1:1:1:16
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `launchTheNukes!` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:16),Int(1:17-1:20),EndOfFile(1:20-1:20),
diff --git a/src/snapshots/old_syntax/call_bang_no_space.md b/src/snapshots/old_syntax/call_bang_no_space.md
index 6bd434fed5..8d90dde572 100644
--- a/src/snapshots/old_syntax/call_bang_no_space.md
+++ b/src/snapshots/old_syntax/call_bang_no_space.md
@@ -8,9 +8,12 @@ type=expr
 fxFn!arg
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - call_bang_no_space.md:1:1:1:9
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `fxFn!arg` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:9),EndOfFile(1:9-1:9),
diff --git a/src/snapshots/old_syntax/closure_in_apply_in_binop.md b/src/snapshots/old_syntax/closure_in_apply_in_binop.md
index 05bd4609ca..4066e19d4f 100644
--- a/src/snapshots/old_syntax/closure_in_apply_in_binop.md
+++ b/src/snapshots/old_syntax/closure_in_apply_in_binop.md
@@ -9,9 +9,12 @@ m0\w->w?e
 /s
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - closure_in_apply_in_binop.md:1:1:1:3
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `m0` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:3),OpBackslash(1:3-1:4),LowerIdent(1:4-1:5),OpArrow(1:5-1:7),LowerIdent(1:7-1:8),NoSpaceOpQuestion(1:8-1:9),LowerIdent(1:9-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/closure_in_binop_with_spaces.md b/src/snapshots/old_syntax/closure_in_binop_with_spaces.md
index 6973f51840..16d7c6c7b1 100644
--- a/src/snapshots/old_syntax/closure_in_binop_with_spaces.md
+++ b/src/snapshots/old_syntax/closure_in_binop_with_spaces.md
@@ -10,8 +10,6 @@ i>\s->s
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - closure_in_binop_with_spaces.md:1:3:1:5
-UNDEFINED VARIABLE - closure_in_binop_with_spaces.md:1:1:1:2
-expr_not_canonicalized - closure_in_binop_with_spaces.md:1:1:1:5
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **\s** is not expected in an expression.
@@ -25,6 +23,14 @@ i>\s->s
   ^^
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `i` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpGreaterThan(1:2-1:3),OpBackslash(1:3-1:4),LowerIdent(1:4-1:5),OpArrow(1:5-1:7),LowerIdent(1:7-1:8),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/closure_with_binops_and_unary.md b/src/snapshots/old_syntax/closure_with_binops_and_unary.md
index aab7cec823..3987fbb49d 100644
--- a/src/snapshots/old_syntax/closure_with_binops_and_unary.md
+++ b/src/snapshots/old_syntax/closure_with_binops_and_unary.md
@@ -10,9 +10,12 @@ m
  w
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - closure_with_binops_and_unary.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `m` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/comment_after_expr_in_parens.md b/src/snapshots/old_syntax/comment_after_expr_in_parens.md
index ca43f66067..85d4ea8227 100644
--- a/src/snapshots/old_syntax/comment_after_expr_in_parens.md
+++ b/src/snapshots/old_syntax/comment_after_expr_in_parens.md
@@ -9,9 +9,12 @@ type=expr
 )
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - comment_after_expr_in_parens.md:1:2:1:3
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `i` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenRound(1:1-1:2),LowerIdent(1:2-1:3),Newline(1:4-1:7),
diff --git a/src/snapshots/old_syntax/comment_after_whitespace_apply_arg_inside_pnc_apply.md b/src/snapshots/old_syntax/comment_after_whitespace_apply_arg_inside_pnc_apply.md
index 9b5387d259..f8556f32bc 100644
--- a/src/snapshots/old_syntax/comment_after_whitespace_apply_arg_inside_pnc_apply.md
+++ b/src/snapshots/old_syntax/comment_after_whitespace_apply_arg_inside_pnc_apply.md
@@ -16,7 +16,7 @@ PP(mport#<|"P
 )
 ~~~
 # EXPECTED
-expected_expr_apply_close_round - comment_after_whitespace_apply_arg_inside_pnc_apply.md:1:1:1:4
+PARSE ERROR - comment_after_whitespace_apply_arg_inside_pnc_apply.md:1:1:1:4
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `expected_expr_apply_close_round`
diff --git a/src/snapshots/old_syntax/comment_before_colon_def.md b/src/snapshots/old_syntax/comment_before_colon_def.md
index 547e4a4bae..f321b29eef 100644
--- a/src/snapshots/old_syntax/comment_before_colon_def.md
+++ b/src/snapshots/old_syntax/comment_before_colon_def.md
@@ -10,9 +10,12 @@ w#
 Q
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - comment_before_colon_def.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `w` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),Newline(1:3-1:3),
diff --git a/src/snapshots/old_syntax/comment_before_equals_def.md b/src/snapshots/old_syntax/comment_before_equals_def.md
index 602ee87418..9475ecaa3e 100644
--- a/src/snapshots/old_syntax/comment_before_equals_def.md
+++ b/src/snapshots/old_syntax/comment_before_equals_def.md
@@ -10,9 +10,12 @@ t#
 e
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - comment_before_equals_def.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `t` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),Newline(1:3-1:3),
diff --git a/src/snapshots/old_syntax/comment_in_tuple_ext.md b/src/snapshots/old_syntax/comment_in_tuple_ext.md
index deb1b39406..c9be024b79 100644
--- a/src/snapshots/old_syntax/comment_in_tuple_ext.md
+++ b/src/snapshots/old_syntax/comment_in_tuple_ext.md
@@ -11,9 +11,12 @@ t:()(n#
 p#
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - comment_in_tuple_ext.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `t` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:2-1:3),NoSpaceOpenRound(1:3-1:4),CloseRound(1:4-1:5),NoSpaceOpenRound(1:5-1:6),LowerIdent(1:6-1:7),Newline(1:8-1:8),
diff --git a/src/snapshots/old_syntax/comment_indent_in_parens.md b/src/snapshots/old_syntax/comment_indent_in_parens.md
index bc47bb12fd..00fb8bf1d6 100644
--- a/src/snapshots/old_syntax/comment_indent_in_parens.md
+++ b/src/snapshots/old_syntax/comment_indent_in_parens.md
@@ -11,7 +11,7 @@ type=expr
 M
 ~~~
 # EXPECTED
-NIL
+TYPE MISMATCH - comment_indent_in_parens.md:1:1:1:2
 # PROBLEMS
 **TYPE MISMATCH**
 This expression is used in an unexpected way:
diff --git a/src/snapshots/old_syntax/comment_parens_in_typ_annotation_record_field.md b/src/snapshots/old_syntax/comment_parens_in_typ_annotation_record_field.md
index 26de4d5269..0577be9240 100644
--- a/src/snapshots/old_syntax/comment_parens_in_typ_annotation_record_field.md
+++ b/src/snapshots/old_syntax/comment_parens_in_typ_annotation_record_field.md
@@ -10,9 +10,12 @@ i:{t:(J#
 A
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - comment_parens_in_typ_annotation_record_field.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `i` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:2-1:3),OpenCurly(1:3-1:4),LowerIdent(1:4-1:5),OpColon(1:5-1:6),NoSpaceOpenRound(1:6-1:7),UpperIdent(1:7-1:8),Newline(1:9-1:9),
diff --git a/src/snapshots/old_syntax/compare_apply_record.md b/src/snapshots/old_syntax/compare_apply_record.md
index 806e4d6277..54c93dec89 100644
--- a/src/snapshots/old_syntax/compare_apply_record.md
+++ b/src/snapshots/old_syntax/compare_apply_record.md
@@ -11,10 +11,16 @@ x{
 }<r
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - compare_apply_record.md:1:1:1:2
-UNDEFINED VARIABLE - compare_apply_record.md:2:1:2:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpGreaterThan(1:2-1:3),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/crazy_annotation_left.md b/src/snapshots/old_syntax/crazy_annotation_left.md
index 96f58d5c4e..a010e27bf1 100644
--- a/src/snapshots/old_syntax/crazy_annotation_left.md
+++ b/src/snapshots/old_syntax/crazy_annotation_left.md
@@ -11,7 +11,8 @@ type=expr
 t
 ~~~
 # EXPECTED
-NIL
+TYPE MISMATCH - crazy_annotation_left.md:1:4:1:5
+TYPE MISMATCH - crazy_annotation_left.md:1:1:1:2
 # PROBLEMS
 **TYPE MISMATCH**
 This expression is used in an unexpected way:
diff --git a/src/snapshots/old_syntax/crazy_annotation_left2.md b/src/snapshots/old_syntax/crazy_annotation_left2.md
index 39f8979b8f..35b3e4be93 100644
--- a/src/snapshots/old_syntax/crazy_annotation_left2.md
+++ b/src/snapshots/old_syntax/crazy_annotation_left2.md
@@ -13,8 +13,12 @@ type=expr
 e
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - crazy_annotation_left2.md:1:3:1:5
+UNDEFINED VARIABLE - crazy_annotation_left2.md:1:1:1:2
 # PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `ts` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 **TYPE MISMATCH**
 This expression is used in an unexpected way:
 **crazy_annotation_left2.md:1:1:1:2:**
diff --git a/src/snapshots/old_syntax/crazy_parens_multiline_str_question_etc.md b/src/snapshots/old_syntax/crazy_parens_multiline_str_question_etc.md
index ccc1f1e225..1b75d07ce0 100644
--- a/src/snapshots/old_syntax/crazy_parens_multiline_str_question_etc.md
+++ b/src/snapshots/old_syntax/crazy_parens_multiline_str_question_etc.md
@@ -9,8 +9,8 @@ type=expr
 -""""""()?))Y
 ~~~
 # EXPECTED
-expected_expr_close_round_or_comma - crazy_parens_multiline_str_question_etc.md:2:9:2:11
-expected_expr_close_round_or_comma - crazy_parens_multiline_str_question_etc.md:2:11:2:13
+PARSE ERROR - crazy_parens_multiline_str_question_etc.md:2:9:2:11
+PARSE ERROR - crazy_parens_multiline_str_question_etc.md:2:11:2:13
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `expected_expr_close_round_or_comma`
diff --git a/src/snapshots/old_syntax/dbg.md b/src/snapshots/old_syntax/dbg.md
index d2970daff6..67e58257a0 100644
--- a/src/snapshots/old_syntax/dbg.md
+++ b/src/snapshots/old_syntax/dbg.md
@@ -8,9 +8,12 @@ type=expr
 dbg 1
 ~~~
 # EXPECTED
-not_implemented - dbg.md:1:1:1:1
-# PROBLEMS
 NIL
+# PROBLEMS
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize dbg expression
+Let us know if you want to help!
+
 # TOKENS
 ~~~zig
 KwDbg(1:1-1:4),Int(1:5-1:6),EndOfFile(1:6-1:6),
diff --git a/src/snapshots/old_syntax/dbg_bang_neg_bang_if_bang.md b/src/snapshots/old_syntax/dbg_bang_neg_bang_if_bang.md
index 4d7052fce4..d72cf0fc6d 100644
--- a/src/snapshots/old_syntax/dbg_bang_neg_bang_if_bang.md
+++ b/src/snapshots/old_syntax/dbg_bang_neg_bang_if_bang.md
@@ -9,8 +9,6 @@ dbg!-!if!
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - dbg_bang_neg_bang_if_bang.md:1:6:1:10
-UNDEFINED VARIABLE - dbg_bang_neg_bang_if_bang.md:1:1:1:5
-expr_not_canonicalized - dbg_bang_neg_bang_if_bang.md:1:1:1:10
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **!if!** is not expected in an expression.
@@ -24,6 +22,14 @@ dbg!-!if!
      ^^^^
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `dbg!` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),OpBinaryMinus(1:5-1:6),OpBang(1:6-1:7),LowerIdent(1:7-1:10),EndOfFile(1:10-1:10),
diff --git a/src/snapshots/old_syntax/dbg_double.md b/src/snapshots/old_syntax/dbg_double.md
index 0cfa5739c1..5357c7afbf 100644
--- a/src/snapshots/old_syntax/dbg_double.md
+++ b/src/snapshots/old_syntax/dbg_double.md
@@ -8,9 +8,12 @@ type=expr
 dbg dbg g g
 ~~~
 # EXPECTED
-not_implemented - dbg_double.md:1:1:1:1
-# PROBLEMS
 NIL
+# PROBLEMS
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize dbg expression
+Let us know if you want to help!
+
 # TOKENS
 ~~~zig
 KwDbg(1:1-1:4),KwDbg(1:5-1:8),LowerIdent(1:9-1:10),LowerIdent(1:11-1:12),EndOfFile(1:12-1:12),
diff --git a/src/snapshots/old_syntax/dbg_double_newline.md b/src/snapshots/old_syntax/dbg_double_newline.md
index 090df494c4..96da519417 100644
--- a/src/snapshots/old_syntax/dbg_double_newline.md
+++ b/src/snapshots/old_syntax/dbg_double_newline.md
@@ -9,9 +9,12 @@ dbg dbg
  a g
 ~~~
 # EXPECTED
-not_implemented - dbg_double_newline.md:1:1:1:1
-# PROBLEMS
 NIL
+# PROBLEMS
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize dbg expression
+Let us know if you want to help!
+
 # TOKENS
 ~~~zig
 KwDbg(1:1-1:4),KwDbg(1:5-1:8),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/dbg_newline_apply.md b/src/snapshots/old_syntax/dbg_newline_apply.md
index e106844e9e..550c4b6704 100644
--- a/src/snapshots/old_syntax/dbg_newline_apply.md
+++ b/src/snapshots/old_syntax/dbg_newline_apply.md
@@ -11,9 +11,12 @@ dbg
   interfacesb
 ~~~
 # EXPECTED
-not_implemented - dbg_newline_apply.md:1:1:1:1
-# PROBLEMS
 NIL
+# PROBLEMS
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize dbg expression
+Let us know if you want to help!
+
 # TOKENS
 ~~~zig
 KwDbg(1:1-1:4),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/dbg_pnc_a_over_a.md b/src/snapshots/old_syntax/dbg_pnc_a_over_a.md
index b9468f55e4..628e7014c5 100644
--- a/src/snapshots/old_syntax/dbg_pnc_a_over_a.md
+++ b/src/snapshots/old_syntax/dbg_pnc_a_over_a.md
@@ -9,9 +9,12 @@ dbg(a/a)
 d
 ~~~
 # EXPECTED
-not_implemented - dbg_pnc_a_over_a.md:1:1:1:1
-# PROBLEMS
 NIL
+# PROBLEMS
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize dbg expression
+Let us know if you want to help!
+
 # TOKENS
 ~~~zig
 KwDbg(1:1-1:4),NoSpaceOpenRound(1:4-1:5),LowerIdent(1:5-1:6),OpSlash(1:6-1:7),LowerIdent(1:7-1:8),CloseRound(1:8-1:9),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/dbg_pnc_in_double_parens.md b/src/snapshots/old_syntax/dbg_pnc_in_double_parens.md
index 0f23d09ae8..d150d3ba58 100644
--- a/src/snapshots/old_syntax/dbg_pnc_in_double_parens.md
+++ b/src/snapshots/old_syntax/dbg_pnc_in_double_parens.md
@@ -9,7 +9,7 @@ type=expr
 r)
 ~~~
 # EXPECTED
-expected_expr_close_round_or_comma - dbg_pnc_in_double_parens.md:2:2:2:3
+PARSE ERROR - dbg_pnc_in_double_parens.md:2:2:2:3
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `expected_expr_close_round_or_comma`
diff --git a/src/snapshots/old_syntax/dbg_pnc_zero_args.md b/src/snapshots/old_syntax/dbg_pnc_zero_args.md
index e71b150d36..ecd196abb7 100644
--- a/src/snapshots/old_syntax/dbg_pnc_zero_args.md
+++ b/src/snapshots/old_syntax/dbg_pnc_zero_args.md
@@ -9,9 +9,12 @@ dbg()
 d
 ~~~
 # EXPECTED
-not_implemented - dbg_pnc_zero_args.md:1:1:1:1
-# PROBLEMS
 NIL
+# PROBLEMS
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize dbg expression
+Let us know if you want to help!
+
 # TOKENS
 ~~~zig
 KwDbg(1:1-1:4),NoSpaceOpenRound(1:4-1:5),CloseRound(1:5-1:6),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/dbg_stmt_in_parens.md b/src/snapshots/old_syntax/dbg_stmt_in_parens.md
index afb948bf77..ed49a25ee7 100644
--- a/src/snapshots/old_syntax/dbg_stmt_in_parens.md
+++ b/src/snapshots/old_syntax/dbg_stmt_in_parens.md
@@ -10,7 +10,7 @@ type=expr
 h)
 ~~~
 # EXPECTED
-expected_expr_close_round_or_comma - dbg_stmt_in_parens.md:3:2:3:3
+PARSE ERROR - dbg_stmt_in_parens.md:3:2:3:3
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `expected_expr_close_round_or_comma`
diff --git a/src/snapshots/old_syntax/dbg_stmt_multiline.md b/src/snapshots/old_syntax/dbg_stmt_multiline.md
index 629d86fe71..efeebd76a7 100644
--- a/src/snapshots/old_syntax/dbg_stmt_multiline.md
+++ b/src/snapshots/old_syntax/dbg_stmt_multiline.md
@@ -11,9 +11,12 @@ dbg (5,
 4
 ~~~
 # EXPECTED
-not_implemented - dbg_stmt_multiline.md:1:1:1:1
-# PROBLEMS
 NIL
+# PROBLEMS
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize dbg expression
+Let us know if you want to help!
+
 # TOKENS
 ~~~zig
 KwDbg(1:1-1:4),OpenRound(1:5-1:6),Int(1:6-1:7),Comma(1:7-1:8),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/dbg_stmt_two_exprs.md b/src/snapshots/old_syntax/dbg_stmt_two_exprs.md
index b7c0208ac3..a3738b2f98 100644
--- a/src/snapshots/old_syntax/dbg_stmt_two_exprs.md
+++ b/src/snapshots/old_syntax/dbg_stmt_two_exprs.md
@@ -12,7 +12,7 @@ g
  qt
 ~~~
 # EXPECTED
-not_implemented - dbg_stmt_two_exprs.md:1:1:1:1
+PARSE ERROR - dbg_stmt_two_exprs.md:3:7:3:7
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `expected_expr_close_round_or_comma`
@@ -26,6 +26,10 @@ Here is the problematic code:
       
 
 
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize dbg expression
+Let us know if you want to help!
+
 # TOKENS
 ~~~zig
 KwDbg(1:1-1:4),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/dbg_then_double_parens_cont.md b/src/snapshots/old_syntax/dbg_then_double_parens_cont.md
index ab2c87e184..1e990086eb 100644
--- a/src/snapshots/old_syntax/dbg_then_double_parens_cont.md
+++ b/src/snapshots/old_syntax/dbg_then_double_parens_cont.md
@@ -10,9 +10,12 @@ dbg g
 ))#
 ~~~
 # EXPECTED
-not_implemented - dbg_then_double_parens_cont.md:1:1:1:1
-# PROBLEMS
 NIL
+# PROBLEMS
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize dbg expression
+Let us know if you want to help!
+
 # TOKENS
 ~~~zig
 KwDbg(1:1-1:4),LowerIdent(1:5-1:6),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/def_bang.md b/src/snapshots/old_syntax/def_bang.md
index d946f60bee..9cb8f31c1e 100644
--- a/src/snapshots/old_syntax/def_bang.md
+++ b/src/snapshots/old_syntax/def_bang.md
@@ -11,9 +11,12 @@ launchTheNukes! = \{} ->
 launchTheNukes! {}
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - def_bang.md:1:1:1:16
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `launchTheNukes!` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:16),OpAssign(1:17-1:18),OpBackslash(1:19-1:20),OpenCurly(1:20-1:21),CloseCurly(1:21-1:22),OpArrow(1:23-1:25),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/def_missing_final_expression.md b/src/snapshots/old_syntax/def_missing_final_expression.md
index 355d88dc40..2fcf80bf99 100644
--- a/src/snapshots/old_syntax/def_missing_final_expression.md
+++ b/src/snapshots/old_syntax/def_missing_final_expression.md
@@ -8,9 +8,12 @@ type=expr
 f : Foo.foo
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - def_missing_final_expression.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),UpperIdent(1:5-1:8),NoSpaceDotLowerIdent(1:8-1:12),EndOfFile(1:12-1:12),
diff --git a/src/snapshots/old_syntax/def_multistring_apply.md b/src/snapshots/old_syntax/def_multistring_apply.md
index 568504102f..6e971c2d85 100644
--- a/src/snapshots/old_syntax/def_multistring_apply.md
+++ b/src/snapshots/old_syntax/def_multistring_apply.md
@@ -9,9 +9,12 @@ e=""""""a
 p
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - def_multistring_apply.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `e` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpAssign(1:2-1:3),MultilineStringStart(1:3-1:6),StringPart(1:6-1:6),MultilineStringEnd(1:6-1:9),LowerIdent(1:9-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/def_without_newline.md b/src/snapshots/old_syntax/def_without_newline.md
index 8180cf3ce5..7010001090 100644
--- a/src/snapshots/old_syntax/def_without_newline.md
+++ b/src/snapshots/old_syntax/def_without_newline.md
@@ -8,9 +8,12 @@ type=expr
 a:b i
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - def_without_newline.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `a` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:2-1:3),LowerIdent(1:3-1:4),LowerIdent(1:5-1:6),EndOfFile(1:6-1:6),
diff --git a/src/snapshots/old_syntax/deprecated_interpolated_string.md b/src/snapshots/old_syntax/deprecated_interpolated_string.md
index f31aa7c27e..9eff38b622 100644
--- a/src/snapshots/old_syntax/deprecated_interpolated_string.md
+++ b/src/snapshots/old_syntax/deprecated_interpolated_string.md
@@ -8,7 +8,7 @@ type=expr
 "\(e)"
 ~~~
 # EXPECTED
-InvalidEscapeSequence - deprecated_interpolated_string.md:1:3:1:3
+NIL
 # PROBLEMS
 **INVALID ESCAPE SEQUENCE**
 This escape sequence is not recognized.
diff --git a/src/snapshots/old_syntax/double_parens_comment_tuple_pat.md b/src/snapshots/old_syntax/double_parens_comment_tuple_pat.md
index 3e505a0b4b..5dacbceb9f 100644
--- a/src/snapshots/old_syntax/double_parens_comment_tuple_pat.md
+++ b/src/snapshots/old_syntax/double_parens_comment_tuple_pat.md
@@ -11,7 +11,7 @@ type=expr
 t#
 ~~~
 # EXPECTED
-expected_expr_close_round_or_comma - double_parens_comment_tuple_pat.md:3:1:3:3
+PARSE ERROR - double_parens_comment_tuple_pat.md:3:1:3:3
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `expected_expr_close_round_or_comma`
diff --git a/src/snapshots/old_syntax/double_plus.md b/src/snapshots/old_syntax/double_plus.md
index e1765d492a..3c65c306f8 100644
--- a/src/snapshots/old_syntax/double_plus.md
+++ b/src/snapshots/old_syntax/double_plus.md
@@ -9,9 +9,12 @@ main =
     [] ++ []
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - double_plus.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `main` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),OpAssign(1:6-1:7),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/double_question_binop.md b/src/snapshots/old_syntax/double_question_binop.md
index 8e70a0ab60..3c26e8a445 100644
--- a/src/snapshots/old_syntax/double_question_binop.md
+++ b/src/snapshots/old_syntax/double_question_binop.md
@@ -8,9 +8,12 @@ type=expr
 get_name! {} ?? "Bob"
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - double_question_binop.md:1:1:1:10
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `get_name!` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:10),OpenCurly(1:11-1:12),CloseCurly(1:12-1:13),OpDoubleQuestion(1:14-1:16),StringStart(1:17-1:18),StringPart(1:18-1:21),StringEnd(1:21-1:22),EndOfFile(1:22-1:22),
diff --git a/src/snapshots/old_syntax/elm_function_syntax.md b/src/snapshots/old_syntax/elm_function_syntax.md
index 13997ce0ce..622a3c55be 100644
--- a/src/snapshots/old_syntax/elm_function_syntax.md
+++ b/src/snapshots/old_syntax/elm_function_syntax.md
@@ -8,9 +8,12 @@ type=expr
 f x y = x
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - elm_function_syntax.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),LowerIdent(1:3-1:4),LowerIdent(1:5-1:6),OpAssign(1:7-1:8),LowerIdent(1:9-1:10),EndOfFile(1:10-1:10),
diff --git a/src/snapshots/old_syntax/empty_or_pattern.md b/src/snapshots/old_syntax/empty_or_pattern.md
index 5b21af3146..5d5d1a5f78 100644
--- a/src/snapshots/old_syntax/empty_or_pattern.md
+++ b/src/snapshots/old_syntax/empty_or_pattern.md
@@ -13,9 +13,12 @@ when Just 4 is
         2
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - empty_or_pattern.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),UpperIdent(1:6-1:10),Int(1:11-1:12),LowerIdent(1:13-1:15),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/empty_record_update.md b/src/snapshots/old_syntax/empty_record_update.md
index a9f42150f3..5635b2e219 100644
--- a/src/snapshots/old_syntax/empty_record_update.md
+++ b/src/snapshots/old_syntax/empty_record_update.md
@@ -9,7 +9,6 @@ type=expr
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - empty_record_update.md:1:3:1:5
-UNDEFINED VARIABLE - empty_record_update.md:1:2:1:3
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **&}** is not expected in an expression.
@@ -23,6 +22,10 @@ Here is the problematic code:
   ^^
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `e` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),LowerIdent(1:2-1:3),OpAmpersand(1:3-1:4),CloseCurly(1:4-1:5),EndOfFile(1:5-1:5),
diff --git a/src/snapshots/old_syntax/empty_try_pnc.md b/src/snapshots/old_syntax/empty_try_pnc.md
index 852219dffb..42b2ddef99 100644
--- a/src/snapshots/old_syntax/empty_try_pnc.md
+++ b/src/snapshots/old_syntax/empty_try_pnc.md
@@ -8,9 +8,12 @@ type=expr
 try()t
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - empty_try_pnc.md:1:1:1:4
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `try` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:4),NoSpaceOpenRound(1:4-1:5),CloseRound(1:5-1:6),LowerIdent(1:6-1:7),EndOfFile(1:7-1:7),
diff --git a/src/snapshots/old_syntax/equals.md b/src/snapshots/old_syntax/equals.md
index 4e7d0ecc8d..0d395fd0c5 100644
--- a/src/snapshots/old_syntax/equals.md
+++ b/src/snapshots/old_syntax/equals.md
@@ -8,10 +8,16 @@ type=expr
 x==y
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - equals.md:1:1:1:2
-UNDEFINED VARIABLE - equals.md:1:4:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `y` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpEquals(1:2-1:4),LowerIdent(1:4-1:5),EndOfFile(1:5-1:5),
diff --git a/src/snapshots/old_syntax/equals_with_spaces.md b/src/snapshots/old_syntax/equals_with_spaces.md
index 6f116b1757..88e52a03c0 100644
--- a/src/snapshots/old_syntax/equals_with_spaces.md
+++ b/src/snapshots/old_syntax/equals_with_spaces.md
@@ -8,10 +8,16 @@ type=expr
 x == y
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - equals_with_spaces.md:1:1:1:2
-UNDEFINED VARIABLE - equals_with_spaces.md:1:6:1:7
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `y` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpEquals(1:3-1:5),LowerIdent(1:6-1:7),EndOfFile(1:7-1:7),
diff --git a/src/snapshots/old_syntax/error_inline_alias_argument_uppercase.md b/src/snapshots/old_syntax/error_inline_alias_argument_uppercase.md
index 338de1f9f5..9b07191710 100644
--- a/src/snapshots/old_syntax/error_inline_alias_argument_uppercase.md
+++ b/src/snapshots/old_syntax/error_inline_alias_argument_uppercase.md
@@ -8,9 +8,12 @@ type=expr
 f : List elem -> [Nil, Cons elem a] as LinkedList U
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - error_inline_alias_argument_uppercase.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),UpperIdent(1:5-1:9),LowerIdent(1:10-1:14),OpArrow(1:15-1:17),OpenSquare(1:18-1:19),UpperIdent(1:19-1:22),Comma(1:22-1:23),UpperIdent(1:24-1:28),LowerIdent(1:29-1:33),LowerIdent(1:34-1:35),CloseSquare(1:35-1:36),KwAs(1:37-1:39),UpperIdent(1:40-1:50),UpperIdent(1:51-1:52),EndOfFile(1:52-1:52),
diff --git a/src/snapshots/old_syntax/error_inline_alias_not_an_alias.md b/src/snapshots/old_syntax/error_inline_alias_not_an_alias.md
index 424b724a6c..20f49f0e1a 100644
--- a/src/snapshots/old_syntax/error_inline_alias_not_an_alias.md
+++ b/src/snapshots/old_syntax/error_inline_alias_not_an_alias.md
@@ -8,9 +8,12 @@ type=expr
 f : List elem -> [Nil, Cons elem a] as a
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - error_inline_alias_not_an_alias.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),UpperIdent(1:5-1:9),LowerIdent(1:10-1:14),OpArrow(1:15-1:17),OpenSquare(1:18-1:19),UpperIdent(1:19-1:22),Comma(1:22-1:23),UpperIdent(1:24-1:28),LowerIdent(1:29-1:33),LowerIdent(1:34-1:35),CloseSquare(1:35-1:36),KwAs(1:37-1:39),LowerIdent(1:40-1:41),EndOfFile(1:41-1:41),
diff --git a/src/snapshots/old_syntax/error_inline_alias_qualified.md b/src/snapshots/old_syntax/error_inline_alias_qualified.md
index 7114c588d2..839baa8841 100644
--- a/src/snapshots/old_syntax/error_inline_alias_qualified.md
+++ b/src/snapshots/old_syntax/error_inline_alias_qualified.md
@@ -8,9 +8,12 @@ type=expr
 f : List elem -> [Nil, Cons elem a] as Module.LinkedList a
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - error_inline_alias_qualified.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),UpperIdent(1:5-1:9),LowerIdent(1:10-1:14),OpArrow(1:15-1:17),OpenSquare(1:18-1:19),UpperIdent(1:19-1:22),Comma(1:22-1:23),UpperIdent(1:24-1:28),LowerIdent(1:29-1:33),LowerIdent(1:34-1:35),CloseSquare(1:35-1:36),KwAs(1:37-1:39),UpperIdent(1:40-1:46),NoSpaceDotUpperIdent(1:46-1:57),LowerIdent(1:58-1:59),EndOfFile(1:59-1:59),
diff --git a/src/snapshots/old_syntax/expect_single_line.md b/src/snapshots/old_syntax/expect_single_line.md
index 678b694280..48532e4e80 100644
--- a/src/snapshots/old_syntax/expect_single_line.md
+++ b/src/snapshots/old_syntax/expect_single_line.md
@@ -14,9 +14,12 @@ expect y == z
 42
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - expect_single_line.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpAssign(1:3-1:4),Int(1:5-1:6),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/exponential_else_branch_parsing_repro.md b/src/snapshots/old_syntax/exponential_else_branch_parsing_repro.md
index 8538048aa2..3594840743 100644
--- a/src/snapshots/old_syntax/exponential_else_branch_parsing_repro.md
+++ b/src/snapshots/old_syntax/exponential_else_branch_parsing_repro.md
@@ -14,9 +14,12 @@ t__T+_____^_zese
 else
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - exponential_else_branch_parsing_repro.md:1:1:1:3
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `ee` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:3),OpAmpersand(1:3-1:4),OpAmpersand(1:4-1:5),LowerIdent(1:5-1:10),MalformedOpaqueNameWithoutName(1:10-1:11),OpAmpersand(1:11-1:12),LowerIdent(1:12-1:16),OpSlash(1:16-1:17),LowerIdent(1:17-1:21),Dot(1:21-1:22),OpBang(1:22-1:23),LowerIdent(1:23-1:26),OpAmpersand(1:26-1:27),LowerIdent(1:27-1:28),MalformedOpaqueNameWithoutName(1:28-1:29),OpAmpersand(1:29-1:30),LowerIdent(1:30-1:32),OpSlash(1:32-1:33),KwIf(1:33-1:35),Dot(1:35-1:36),OpBang(1:36-1:37),LowerIdent(1:37-1:40),OpAmpersand(1:40-1:41),OpAmpersand(1:41-1:42),LowerIdent(1:42-1:46),OpaqueName(1:46-1:51),Dot(1:51-1:52),OpBang(1:52-1:53),LowerIdent(1:53-1:56),OpAmpersand(1:56-1:57),LowerIdent(1:57-1:58),MalformedOpaqueNameWithoutName(1:58-1:59),OpAmpersand(1:59-1:60),LowerIdent(1:60-1:62),OpSlash(1:62-1:63),KwIf(1:63-1:65),Dot(1:65-1:66),OpBang(1:66-1:67),LowerIdent(1:67-1:70),OpAmpersand(1:70-1:71),OpAmpersand(1:71-1:72),LowerIdent(1:72-1:76),OpaqueName(1:76-1:78),OpSlash(1:78-1:79),KwIf(1:79-1:81),Dot(1:81-1:82),OpBang(1:82-1:83),KwIf(1:83-1:85),Dot(1:85-1:86),OpBang(1:86-1:87),OpAmpersand(1:87-1:88),LowerIdent(1:88-1:90),OpSlash(1:90-1:91),KwIf(1:91-1:93),Dot(1:93-1:94),OpBang(1:94-1:95),LowerIdent(1:95-1:98),OpAmpersand(1:98-1:99),OpAmpersand(1:99-1:100),LowerIdent(1:100-1:104),OpaqueName(1:104-1:106),OpSlash(1:106-1:107),KwIf(1:107-1:109),Dot(1:109-1:110),OpBang(1:110-1:111),LowerIdent(1:111-1:114),OpSlash(1:114-1:115),KwIf(1:115-1:117),NoSpaceDotLowerIdent(1:117-1:122),Dot(1:122-1:123),OpBang(1:123-1:124),LowerIdent(1:124-1:127),OpAmpersand(1:127-1:128),LowerIdent(1:128-1:129),MalformedOpaqueNameWithoutName(1:129-1:130),OpAmpersand(1:130-1:131),LowerIdent(1:131-1:133),OpSlash(1:133-1:134),KwIf(1:134-1:136),Dot(1:136-1:137),OpBang(1:137-1:138),LowerIdent(1:138-1:141),OpAmpersand(1:141-1:142),OpAmpersand(1:142-1:143),LowerIdent(1:143-1:147),OpaqueName(1:147-1:149),OpSlash(1:149-1:150),KwIf(1:150-1:152),Dot(1:152-1:153),OpBang(1:153-1:154),KwIf(1:154-1:156),Dot(1:156-1:157),OpBang(1:157-1:158),LowerIdent(1:158-1:163),OpSlash(1:163-1:164),KwIf(1:164-1:166),Dot(1:166-1:167),OpBang(1:167-1:168),LowerIdent(1:168-1:171),OpAmpersand(1:171-1:172),LowerIdent(1:172-1:173),MalformedOpaqueNameWithoutName(1:173-1:174),OpAmpersand(1:174-1:175),LowerIdent(1:175-1:176),OpAmpersand(1:176-1:177),OpAmpersand(1:177-1:178),LowerIdent(1:178-1:182),OpaqueName(1:182-1:184),OpSlash(1:184-1:185),KwIf(1:185-1:187),Dot(1:187-1:188),OpBang(1:188-1:189),LowerIdent(1:189-1:192),OpSlash(1:192-1:193),KwIf(1:193-1:195),NoSpaceDotLowerIdent(1:195-1:200),Dot(1:200-1:201),OpBang(1:201-1:202),LowerIdent(1:202-1:205),OpAmpersand(1:205-1:206),LowerIdent(1:206-1:207),MalformedOpaqueNameWithoutName(1:207-1:208),OpAmpersand(1:208-1:209),LowerIdent(1:209-1:211),OpSlash(1:211-1:212),KwIf(1:212-1:214),Dot(1:214-1:215),OpBang(1:215-1:216),LowerIdent(1:216-1:219),OpAmpersand(1:219-1:220),OpAmpersand(1:220-1:221),LowerIdent(1:221-1:225),OpaqueName(1:225-1:227),OpSlash(1:227-1:228),KwIf(1:228-1:230),Dot(1:230-1:231),OpBang(1:231-1:232),KwIf(1:232-1:234),Dot(1:234-1:235),OpBang(1:235-1:236),LowerIdent(1:236-1:241),OpSlash(1:241-1:242),KwIf(1:242-1:244),Dot(1:244-1:245),OpBang(1:245-1:246),LowerIdent(1:246-1:249),OpAmpersand(1:249-1:250),LowerIdent(1:250-1:251),MalformedOpaqueNameWithoutName(1:251-1:252),OpAmpersand(1:252-1:253),LowerIdent(1:253-1:259),OpSlash(1:259-1:260),KwIf(1:260-1:262),Dot(1:262-1:263),OpBang(1:263-1:264),KwIf(1:264-1:266),Dot(1:266-1:267),OpBang(1:267-1:268),LowerIdent(1:268-1:275),OpSlash(1:275-1:276),KwIf(1:276-1:278),Dot(1:278-1:279),OpBang(1:279-1:280),KwIf(1:280-1:282),Dot(1:282-1:283),OpBang(1:283-1:284),LowerIdent(1:284-1:288),OpSlash(1:288-1:289),KwIf(1:289-1:291),Dot(1:291-1:292),OpBang(1:292-1:293),LowerIdent(1:293-1:295),Newline(1:296-1:297),
diff --git a/src/snapshots/old_syntax/ext_on_fn_ty.md b/src/snapshots/old_syntax/ext_on_fn_ty.md
index b76aab9d9c..e782e7f64e 100644
--- a/src/snapshots/old_syntax/ext_on_fn_ty.md
+++ b/src/snapshots/old_syntax/ext_on_fn_ty.md
@@ -9,9 +9,12 @@ t:(w=>p)a
 t
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - ext_on_fn_ty.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `t` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:2-1:3),NoSpaceOpenRound(1:3-1:4),LowerIdent(1:4-1:5),OpFatArrow(1:5-1:7),LowerIdent(1:7-1:8),CloseRound(1:8-1:9),LowerIdent(1:9-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/extra_newline.md b/src/snapshots/old_syntax/extra_newline.md
index aaf21bd209..e43b061e68 100644
--- a/src/snapshots/old_syntax/extra_newline.md
+++ b/src/snapshots/old_syntax/extra_newline.md
@@ -12,7 +12,7 @@ else # 3
     c # 4
 ~~~
 # EXPECTED
-no_else - extra_newline.md:2:5:2:8
+PARSE ERROR - extra_newline.md:2:5:2:8
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `no_else`
diff --git a/src/snapshots/old_syntax/f_not_not_f.md b/src/snapshots/old_syntax/f_not_not_f.md
index 3c03c8457b..0f9352408b 100644
--- a/src/snapshots/old_syntax/f_not_not_f.md
+++ b/src/snapshots/old_syntax/f_not_not_f.md
@@ -10,9 +10,12 @@ f
 !f
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - f_not_not_f.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/fn_with_record_arg.md b/src/snapshots/old_syntax/fn_with_record_arg.md
index 06cfbc36b3..0fa73bae03 100644
--- a/src/snapshots/old_syntax/fn_with_record_arg.md
+++ b/src/snapshots/old_syntax/fn_with_record_arg.md
@@ -12,9 +12,12 @@ table = \{height} -> crash "not implemented"
 table
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - fn_with_record_arg.md:1:1:1:6
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `table` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:6),OpColon(1:7-1:8),OpenCurly(1:9-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/function_with_tuple_ext_type.md b/src/snapshots/old_syntax/function_with_tuple_ext_type.md
index 629fb4492b..c3e3d1bbfa 100644
--- a/src/snapshots/old_syntax/function_with_tuple_ext_type.md
+++ b/src/snapshots/old_syntax/function_with_tuple_ext_type.md
@@ -11,9 +11,12 @@ f = \x -> x
 f ("Str", 42)
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - function_with_tuple_ext_type.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),OpenRound(1:5-1:6),UpperIdent(1:6-1:9),CloseRound(1:9-1:10),LowerIdent(1:10-1:11),OpArrow(1:12-1:14),OpenRound(1:15-1:16),UpperIdent(1:16-1:19),CloseRound(1:19-1:20),LowerIdent(1:20-1:21),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/function_with_tuple_type.md b/src/snapshots/old_syntax/function_with_tuple_type.md
index 8e05f8c112..21b12e3344 100644
--- a/src/snapshots/old_syntax/function_with_tuple_type.md
+++ b/src/snapshots/old_syntax/function_with_tuple_type.md
@@ -11,9 +11,12 @@ f = \x -> (x, x + 1)
 f 42
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - function_with_tuple_type.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),UpperIdent(1:5-1:8),OpArrow(1:9-1:11),OpenRound(1:12-1:13),UpperIdent(1:13-1:16),Comma(1:16-1:17),UpperIdent(1:18-1:21),CloseRound(1:21-1:22),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/h_greater_comment_minus_div.md b/src/snapshots/old_syntax/h_greater_comment_minus_div.md
index 94be3731dd..9e72ac02de 100644
--- a/src/snapshots/old_syntax/h_greater_comment_minus_div.md
+++ b/src/snapshots/old_syntax/h_greater_comment_minus_div.md
@@ -10,8 +10,6 @@ h>#
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - h_greater_comment_minus_div.md:2:2:2:4
-UNDEFINED VARIABLE - h_greater_comment_minus_div.md:1:1:1:2
-expr_not_canonicalized - h_greater_comment_minus_div.md:1:1:2:4
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **-h** is not expected in an expression.
@@ -25,6 +23,14 @@ Here is the problematic code:
  ^^
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `h` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpGreaterThan(1:2-1:3),Newline(1:4-1:4),
diff --git a/src/snapshots/old_syntax/i_over_not_g.md b/src/snapshots/old_syntax/i_over_not_g.md
index 531ce2e840..b51ba7c5c4 100644
--- a/src/snapshots/old_syntax/i_over_not_g.md
+++ b/src/snapshots/old_syntax/i_over_not_g.md
@@ -10,8 +10,7 @@ i/
  g
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - i_over_not_g.md:1:1:1:2
-expr_not_canonicalized - i_over_not_g.md:1:1:1:1
+UNEXPECTED TOKEN IN EXPRESSION - i_over_not_g.md:2:2:2:2
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token  is not expected in an expression.
@@ -25,6 +24,14 @@ Here is the problematic code:
  
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `i` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpSlash(1:2-1:3),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/if_bang_then_bang_indented_else.md b/src/snapshots/old_syntax/if_bang_then_bang_indented_else.md
index d3ddce029d..d6781a786c 100644
--- a/src/snapshots/old_syntax/if_bang_then_bang_indented_else.md
+++ b/src/snapshots/old_syntax/if_bang_then_bang_indented_else.md
@@ -12,9 +12,12 @@ t
 5
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - if_bang_then_bang_indented_else.md:1:2:1:11
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `if!a!then` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:2-1:11),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/if_bang_then_else_one_line.md b/src/snapshots/old_syntax/if_bang_then_else_one_line.md
index 6a23136b45..635382b886 100644
--- a/src/snapshots/old_syntax/if_bang_then_else_one_line.md
+++ b/src/snapshots/old_syntax/if_bang_then_else_one_line.md
@@ -10,9 +10,12 @@ f=if!b!then""else
 ""
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - if_bang_then_else_one_line.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpAssign(1:2-1:3),LowerIdent(1:3-1:12),StringStart(1:12-1:13),StringPart(1:13-1:13),StringEnd(1:13-1:14),KwElse(1:14-1:18),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/if_def.md b/src/snapshots/old_syntax/if_def.md
index e3385b3e58..647d76cd53 100644
--- a/src/snapshots/old_syntax/if_def.md
+++ b/src/snapshots/old_syntax/if_def.md
@@ -10,9 +10,12 @@ iffy=5
 42
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - if_def.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `iffy` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),OpAssign(1:5-1:6),Int(1:6-1:7),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/if_guard_without_condition.md b/src/snapshots/old_syntax/if_guard_without_condition.md
index 78fa483851..ce3f9c3579 100644
--- a/src/snapshots/old_syntax/if_guard_without_condition.md
+++ b/src/snapshots/old_syntax/if_guard_without_condition.md
@@ -13,9 +13,12 @@ when Just 4 is
         2
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - if_guard_without_condition.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),UpperIdent(1:6-1:10),Int(1:11-1:12),LowerIdent(1:13-1:15),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/if_missing_else.md b/src/snapshots/old_syntax/if_missing_else.md
index 59db89105a..1e9c8381c4 100644
--- a/src/snapshots/old_syntax/if_missing_else.md
+++ b/src/snapshots/old_syntax/if_missing_else.md
@@ -8,7 +8,7 @@ type=expr
 if 5 == 5 then 2
 ~~~
 # EXPECTED
-no_else - if_missing_else.md:1:16:1:17
+PARSE ERROR - if_missing_else.md:1:16:1:17
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `no_else`
diff --git a/src/snapshots/old_syntax/if_newline_then_negate_else_recordupdater.md b/src/snapshots/old_syntax/if_newline_then_negate_else_recordupdater.md
index 8fe49d3266..dedd2124ec 100644
--- a/src/snapshots/old_syntax/if_newline_then_negate_else_recordupdater.md
+++ b/src/snapshots/old_syntax/if_newline_then_negate_else_recordupdater.md
@@ -12,8 +12,6 @@ else&m
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - if_newline_then_negate_else_recordupdater.md:4:5:4:7
-UNDEFINED VARIABLE - if_newline_then_negate_else_recordupdater.md:2:1:2:2
-UNDEFINED VARIABLE - if_newline_then_negate_else_recordupdater.md:3:1:3:7
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **&m** is not expected in an expression.
@@ -27,6 +25,21 @@ else&m
     ^^
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `h` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `then!f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**INVALID IF BRANCH**
+The `else` branch of this `if` expression could not be processed.
+
+The `else` branch must contain a valid expression. Check for syntax errors or missing values.
+
+Note: Every `if` expression in Roc must have an `else` branch, and both branches must have the same type.
+
 # TOKENS
 ~~~zig
 KwIf(1:1-1:3),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/if_outdented_else_branch.md b/src/snapshots/old_syntax/if_outdented_else_branch.md
index 967e4d5885..8bce6afd49 100644
--- a/src/snapshots/old_syntax/if_outdented_else_branch.md
+++ b/src/snapshots/old_syntax/if_outdented_else_branch.md
@@ -11,6 +11,7 @@ else
 something better
 ~~~
 # EXPECTED
+PARSE ERROR - if_outdented_else_branch.md:2:5:2:5
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `no_else`
diff --git a/src/snapshots/old_syntax/if_outdented_then.md b/src/snapshots/old_syntax/if_outdented_then.md
index 1daaa8018b..752285b1e3 100644
--- a/src/snapshots/old_syntax/if_outdented_then.md
+++ b/src/snapshots/old_syntax/if_outdented_then.md
@@ -12,9 +12,12 @@ then 2 else 3
 x
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - if_outdented_then.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpAssign(1:3-1:4),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/if_then_weird_indent.md b/src/snapshots/old_syntax/if_then_weird_indent.md
index 7a84ca9074..2423b245e3 100644
--- a/src/snapshots/old_syntax/if_then_weird_indent.md
+++ b/src/snapshots/old_syntax/if_then_weird_indent.md
@@ -14,6 +14,7 @@ A
 r
 ~~~
 # EXPECTED
+PARSE ERROR - if_then_weird_indent.md:4:1:4:1
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `no_else`
diff --git a/src/snapshots/old_syntax/ifbang_eqeq.md b/src/snapshots/old_syntax/ifbang_eqeq.md
index 9ec41d6ed2..d28abff7f3 100644
--- a/src/snapshots/old_syntax/ifbang_eqeq.md
+++ b/src/snapshots/old_syntax/ifbang_eqeq.md
@@ -8,9 +8,12 @@ type=expr
 if!==9
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - ifbang_eqeq.md:1:1:1:4
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `if!` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:4),OpEquals(1:4-1:6),Int(1:6-1:7),EndOfFile(1:7-1:7),
diff --git a/src/snapshots/old_syntax/implements_in_pat_after_comment.md b/src/snapshots/old_syntax/implements_in_pat_after_comment.md
index c365cc7cda..4e389a5d67 100644
--- a/src/snapshots/old_syntax/implements_in_pat_after_comment.md
+++ b/src/snapshots/old_syntax/implements_in_pat_after_comment.md
@@ -10,9 +10,12 @@ s#
 s
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - implements_in_pat_after_comment.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `s` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),Newline(1:3-1:3),
diff --git a/src/snapshots/old_syntax/implements_in_pnc_pattern.md b/src/snapshots/old_syntax/implements_in_pnc_pattern.md
index 8efd42f868..fd51a062c8 100644
--- a/src/snapshots/old_syntax/implements_in_pnc_pattern.md
+++ b/src/snapshots/old_syntax/implements_in_pnc_pattern.md
@@ -10,8 +10,6 @@ c
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - implements_in_pnc_pattern.md:1:3:1:14
-UNDEFINED VARIABLE - implements_in_pnc_pattern.md:1:1:1:2
-UNDEFINED VARIABLE - implements_in_pnc_pattern.md:1:14:1:15
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **implements,** is not expected in an expression.
@@ -25,6 +23,14 @@ g(implements,x)=c
   ^^^^^^^^^^^
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `g` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),NoSpaceOpenRound(1:2-1:3),KwImplements(1:3-1:13),Comma(1:13-1:14),LowerIdent(1:14-1:15),CloseRound(1:15-1:16),OpAssign(1:16-1:17),LowerIdent(1:17-1:18),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/inline_hastype.md b/src/snapshots/old_syntax/inline_hastype.md
index 883208a87a..a3eace4704 100644
--- a/src/snapshots/old_syntax/inline_hastype.md
+++ b/src/snapshots/old_syntax/inline_hastype.md
@@ -11,9 +11,12 @@ main =
     3
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - inline_hastype.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `main` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),OpAssign(1:6-1:7),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/invalid_operator.md b/src/snapshots/old_syntax/invalid_operator.md
index dcce9ed6c9..891f68b687 100644
--- a/src/snapshots/old_syntax/invalid_operator.md
+++ b/src/snapshots/old_syntax/invalid_operator.md
@@ -9,9 +9,12 @@ main =
     5 ** 3
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - invalid_operator.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `main` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),OpAssign(1:6-1:7),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/list_closing_indent_not_enough.md b/src/snapshots/old_syntax/list_closing_indent_not_enough.md
index 3c2a68f763..6478dce4c7 100644
--- a/src/snapshots/old_syntax/list_closing_indent_not_enough.md
+++ b/src/snapshots/old_syntax/list_closing_indent_not_enough.md
@@ -16,9 +16,12 @@ myList = [
 42
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - list_closing_indent_not_enough.md:1:1:1:7
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `myList` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:7),OpAssign(1:8-1:9),OpenSquare(1:10-1:11),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/list_closing_same_indent_no_trailing_comma.md b/src/snapshots/old_syntax/list_closing_same_indent_no_trailing_comma.md
index 05a75c174b..20c0f2989f 100644
--- a/src/snapshots/old_syntax/list_closing_same_indent_no_trailing_comma.md
+++ b/src/snapshots/old_syntax/list_closing_same_indent_no_trailing_comma.md
@@ -12,9 +12,12 @@ myList = [
 42
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - list_closing_same_indent_no_trailing_comma.md:1:1:1:7
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `myList` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:7),OpAssign(1:8-1:9),OpenSquare(1:10-1:11),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/list_closing_same_indent_with_trailing_comma.md b/src/snapshots/old_syntax/list_closing_same_indent_with_trailing_comma.md
index ecee1bf30c..35f443c198 100644
--- a/src/snapshots/old_syntax/list_closing_same_indent_with_trailing_comma.md
+++ b/src/snapshots/old_syntax/list_closing_same_indent_with_trailing_comma.md
@@ -12,9 +12,12 @@ myList = [
 42
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - list_closing_same_indent_with_trailing_comma.md:1:1:1:7
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `myList` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:7),OpAssign(1:8-1:9),OpenSquare(1:10-1:11),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/list_comma_newlines.md b/src/snapshots/old_syntax/list_comma_newlines.md
index 5bc6983789..7c01211361 100644
--- a/src/snapshots/old_syntax/list_comma_newlines.md
+++ b/src/snapshots/old_syntax/list_comma_newlines.md
@@ -10,9 +10,12 @@ type=expr
 ]
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - list_comma_newlines.md:1:2:1:3
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `s` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenSquare(1:1-1:2),LowerIdent(1:2-1:3),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/list_comment_newline.md b/src/snapshots/old_syntax/list_comment_newline.md
index f212731114..360d29496f 100644
--- a/src/snapshots/old_syntax/list_comment_newline.md
+++ b/src/snapshots/old_syntax/list_comment_newline.md
@@ -11,7 +11,7 @@ type=expr
 ]
 ~~~
 # EXPECTED
-expected_expr_close_square_or_comma - list_comment_newline.md:4:1:4:2
+LIST NOT CLOSED - list_comment_newline.md:4:1:4:2
 # PROBLEMS
 **LIST NOT CLOSED**
 This list is missing a closing bracket or has a syntax error.
diff --git a/src/snapshots/old_syntax/list_double_comma.md b/src/snapshots/old_syntax/list_double_comma.md
index bc0a7bf56d..9082064879 100644
--- a/src/snapshots/old_syntax/list_double_comma.md
+++ b/src/snapshots/old_syntax/list_double_comma.md
@@ -9,7 +9,7 @@ type=expr
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - list_double_comma.md:1:8:1:11
-expected_expr_close_square_or_comma - list_double_comma.md:1:11:1:12
+LIST NOT CLOSED - list_double_comma.md:1:11:1:12
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **, 3** is not expected in an expression.
diff --git a/src/snapshots/old_syntax/list_lots_of_spaces.md b/src/snapshots/old_syntax/list_lots_of_spaces.md
index fa26960dd6..0722c4dd8c 100644
--- a/src/snapshots/old_syntax/list_lots_of_spaces.md
+++ b/src/snapshots/old_syntax/list_lots_of_spaces.md
@@ -13,7 +13,7 @@ type=expr
 u]
 ~~~
 # EXPECTED
-expected_expr_close_square_or_comma - list_lots_of_spaces.md:6:2:6:3
+LIST NOT CLOSED - list_lots_of_spaces.md:6:2:6:3
 # PROBLEMS
 **LIST NOT CLOSED**
 This list is missing a closing bracket or has a syntax error.
diff --git a/src/snapshots/old_syntax/list_minus_newlines.md b/src/snapshots/old_syntax/list_minus_newlines.md
index 11721a9e3f..5774ea9931 100644
--- a/src/snapshots/old_syntax/list_minus_newlines.md
+++ b/src/snapshots/old_syntax/list_minus_newlines.md
@@ -9,9 +9,12 @@ type=expr
 ]-i
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - list_minus_newlines.md:2:3:2:4
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `i` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenSquare(1:1-1:2),UpperIdent(1:2-1:3),Comma(1:3-1:4),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/list_pattern_not_terminated.md b/src/snapshots/old_syntax/list_pattern_not_terminated.md
index 6faebe06dd..8f4279f9ca 100644
--- a/src/snapshots/old_syntax/list_pattern_not_terminated.md
+++ b/src/snapshots/old_syntax/list_pattern_not_terminated.md
@@ -9,9 +9,12 @@ when [] is
     [1, 2, -> ""
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - list_pattern_not_terminated.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),OpenSquare(1:6-1:7),CloseSquare(1:7-1:8),LowerIdent(1:9-1:11),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/list_pattern_weird_indent.md b/src/snapshots/old_syntax/list_pattern_weird_indent.md
index ba5351dcec..97753357e5 100644
--- a/src/snapshots/old_syntax/list_pattern_weird_indent.md
+++ b/src/snapshots/old_syntax/list_pattern_weird_indent.md
@@ -10,9 +10,12 @@ when [] is
 3] -> ""
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - list_pattern_weird_indent.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),OpenSquare(1:6-1:7),CloseSquare(1:7-1:8),LowerIdent(1:9-1:11),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/list_pattern_weird_rest_pattern.md b/src/snapshots/old_syntax/list_pattern_weird_rest_pattern.md
index cd51ca1bd2..8eb6849765 100644
--- a/src/snapshots/old_syntax/list_pattern_weird_rest_pattern.md
+++ b/src/snapshots/old_syntax/list_pattern_weird_rest_pattern.md
@@ -9,9 +9,12 @@ when [] is
     [...] -> ""
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - list_pattern_weird_rest_pattern.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),OpenSquare(1:6-1:7),CloseSquare(1:7-1:8),LowerIdent(1:9-1:11),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/list_patterns.md b/src/snapshots/old_syntax/list_patterns.md
index f43b50ed2b..d5fafb4dec 100644
--- a/src/snapshots/old_syntax/list_patterns.md
+++ b/src/snapshots/old_syntax/list_patterns.md
@@ -16,9 +16,12 @@ when [] is
   [[[], []], [[], x]] -> {}
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - list_patterns.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),OpenSquare(1:6-1:7),CloseSquare(1:7-1:8),LowerIdent(1:9-1:11),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/list_without_end.md b/src/snapshots/old_syntax/list_without_end.md
index 5dd04488a8..b993eec4fc 100644
--- a/src/snapshots/old_syntax/list_without_end.md
+++ b/src/snapshots/old_syntax/list_without_end.md
@@ -8,7 +8,7 @@ type=expr
 [1, 2,
 ~~~
 # EXPECTED
-expected_expr_close_square_or_comma - list_without_end.md:1:7:1:7
+LIST NOT CLOSED - list_without_end.md:1:7:1:7
 # PROBLEMS
 **LIST NOT CLOSED**
 This list is missing a closing bracket or has a syntax error.
diff --git a/src/snapshots/old_syntax/long_complex_application_with_pnc.md b/src/snapshots/old_syntax/long_complex_application_with_pnc.md
index 0e39f71c27..c9df7a194d 100644
--- a/src/snapshots/old_syntax/long_complex_application_with_pnc.md
+++ b/src/snapshots/old_syntax/long_complex_application_with_pnc.md
@@ -12,14 +12,32 @@ combine(mix(vodka, gin), Juices({
 }))
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - long_complex_application_with_pnc.md:1:1:1:8
-UNDEFINED VARIABLE - long_complex_application_with_pnc.md:1:9:1:12
-UNDEFINED VARIABLE - long_complex_application_with_pnc.md:1:13:1:18
-UNDEFINED VARIABLE - long_complex_application_with_pnc.md:1:20:1:23
-UNDEFINED VARIABLE - long_complex_application_with_pnc.md:2:12:2:25
-UNDEFINED VARIABLE - long_complex_application_with_pnc.md:3:13:3:27
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `combine` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `mix` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `vodka` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `gin` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `orange` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `orange` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:8),NoSpaceOpenRound(1:8-1:9),LowerIdent(1:9-1:12),NoSpaceOpenRound(1:12-1:13),LowerIdent(1:13-1:18),Comma(1:18-1:19),LowerIdent(1:20-1:23),CloseRound(1:23-1:24),Comma(1:24-1:25),UpperIdent(1:26-1:32),NoSpaceOpenRound(1:32-1:33),OpenCurly(1:33-1:34),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/malformed_pattern_field_access.md b/src/snapshots/old_syntax/malformed_pattern_field_access.md
index 2ee674c28d..ee312f745a 100644
--- a/src/snapshots/old_syntax/malformed_pattern_field_access.md
+++ b/src/snapshots/old_syntax/malformed_pattern_field_access.md
@@ -10,9 +10,12 @@ when x is
     _ -> 4
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - malformed_pattern_field_access.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),LowerIdent(1:6-1:7),LowerIdent(1:8-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/malformed_pattern_module_name.md b/src/snapshots/old_syntax/malformed_pattern_module_name.md
index bfddd69efb..c6267806ec 100644
--- a/src/snapshots/old_syntax/malformed_pattern_module_name.md
+++ b/src/snapshots/old_syntax/malformed_pattern_module_name.md
@@ -10,9 +10,12 @@ when x is
     _ -> 4
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - malformed_pattern_module_name.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),LowerIdent(1:6-1:7),LowerIdent(1:8-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/mega_parens_pat.md b/src/snapshots/old_syntax/mega_parens_pat.md
index 4f5d6e27d9..daad11cfc6 100644
--- a/src/snapshots/old_syntax/mega_parens_pat.md
+++ b/src/snapshots/old_syntax/mega_parens_pat.md
@@ -11,7 +11,7 @@ type=expr
 e
 ~~~
 # EXPECTED
-expected_expr_apply_close_round - mega_parens_pat.md:1:1:1:3
+PARSE ERROR - mega_parens_pat.md:1:1:1:3
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `expected_expr_apply_close_round`
diff --git a/src/snapshots/old_syntax/middle_when_branch_comment_after_parens.md b/src/snapshots/old_syntax/middle_when_branch_comment_after_parens.md
index d9cf86209f..f81c0fd6ae 100644
--- a/src/snapshots/old_syntax/middle_when_branch_comment_after_parens.md
+++ b/src/snapshots/old_syntax/middle_when_branch_comment_after_parens.md
@@ -11,9 +11,12 @@ O->(s
 O->t
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - middle_when_branch_comment_after_parens.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),LowerIdent(1:6-1:7),LowerIdent(1:8-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/minus_minus_six.md b/src/snapshots/old_syntax/minus_minus_six.md
index 276c1f19c4..eb2f6a88f1 100644
--- a/src/snapshots/old_syntax/minus_minus_six.md
+++ b/src/snapshots/old_syntax/minus_minus_six.md
@@ -9,7 +9,7 @@ type=expr
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - minus_minus_six.md:1:2:1:4
-expected_expr_close_round_or_comma - minus_minus_six.md:1:6:1:8
+PARSE ERROR - minus_minus_six.md:1:6:1:8
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **-(** is not expected in an expression.
diff --git a/src/snapshots/old_syntax/minus_newline_minus.md b/src/snapshots/old_syntax/minus_newline_minus.md
index 507137e1b1..871a3c04fc 100644
--- a/src/snapshots/old_syntax/minus_newline_minus.md
+++ b/src/snapshots/old_syntax/minus_newline_minus.md
@@ -10,8 +10,6 @@ s-
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - minus_newline_minus.md:2:2:2:4
-UNDEFINED VARIABLE - minus_newline_minus.md:1:1:1:2
-expr_not_canonicalized - minus_newline_minus.md:1:1:2:4
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **-{** is not expected in an expression.
@@ -25,6 +23,14 @@ Here is the problematic code:
  ^^
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `s` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpBinaryMinus(1:2-1:3),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/minus_newline_minus_minus.md b/src/snapshots/old_syntax/minus_newline_minus_minus.md
index 6274df2a81..89466acd65 100644
--- a/src/snapshots/old_syntax/minus_newline_minus_minus.md
+++ b/src/snapshots/old_syntax/minus_newline_minus_minus.md
@@ -10,8 +10,6 @@ p-
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - minus_newline_minus_minus.md:2:2:2:4
-UNDEFINED VARIABLE - minus_newline_minus_minus.md:1:1:1:2
-expr_not_canonicalized - minus_newline_minus_minus.md:1:1:2:4
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **-t** is not expected in an expression.
@@ -25,6 +23,14 @@ Here is the problematic code:
  ^^
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `p` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpBinaryMinus(1:2-1:3),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/module_dot_tuple.md b/src/snapshots/old_syntax/module_dot_tuple.md
index 155d68d244..50f6f09808 100644
--- a/src/snapshots/old_syntax/module_dot_tuple.md
+++ b/src/snapshots/old_syntax/module_dot_tuple.md
@@ -8,7 +8,7 @@ type=expr
 I.5
 ~~~
 # EXPECTED
-expr_no_space_dot_int - module_dot_tuple.md:1:2:1:4
+PARSE ERROR - module_dot_tuple.md:1:2:1:4
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `expr_no_space_dot_int`
diff --git a/src/snapshots/old_syntax/mul_comment_neg.md b/src/snapshots/old_syntax/mul_comment_neg.md
index ab7af63ec7..3e69760b1f 100644
--- a/src/snapshots/old_syntax/mul_comment_neg.md
+++ b/src/snapshots/old_syntax/mul_comment_neg.md
@@ -10,10 +10,16 @@ n*f
 -f
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - mul_comment_neg.md:1:1:1:2
-UNDEFINED VARIABLE - mul_comment_neg.md:1:3:1:4
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `n` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpStar(1:2-1:3),LowerIdent(1:3-1:4),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/multilin_str_body.md b/src/snapshots/old_syntax/multilin_str_body.md
index 41894822b0..7e5fefb52a 100644
--- a/src/snapshots/old_syntax/multilin_str_body.md
+++ b/src/snapshots/old_syntax/multilin_str_body.md
@@ -9,9 +9,12 @@ a=""""f"""
 f
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - multilin_str_body.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `a` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpAssign(1:2-1:3),MultilineStringStart(1:3-1:6),StringPart(1:6-1:8),MultilineStringEnd(1:8-1:11),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/multiline_binop_when_with_comments.md b/src/snapshots/old_syntax/multiline_binop_when_with_comments.md
index bd5bb6c349..522fe75520 100644
--- a/src/snapshots/old_syntax/multiline_binop_when_with_comments.md
+++ b/src/snapshots/old_syntax/multiline_binop_when_with_comments.md
@@ -32,9 +32,12 @@ is
         42
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - multiline_binop_when_with_comments.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/multiline_str_apply_in_parens_pat.md b/src/snapshots/old_syntax/multiline_str_apply_in_parens_pat.md
index a1f698a108..d93f1a876c 100644
--- a/src/snapshots/old_syntax/multiline_str_apply_in_parens_pat.md
+++ b/src/snapshots/old_syntax/multiline_str_apply_in_parens_pat.md
@@ -9,9 +9,12 @@ u ("""""" (0)):f
 s
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - multiline_str_apply_in_parens_pat.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `u` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpenRound(1:3-1:4),MultilineStringStart(1:4-1:7),StringPart(1:7-1:7),MultilineStringEnd(1:7-1:10),OpenRound(1:11-1:12),Int(1:12-1:13),CloseRound(1:13-1:14),CloseRound(1:14-1:15),OpColon(1:15-1:16),LowerIdent(1:16-1:17),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/multiline_str_in_closure_in_when_guard_wtf.md b/src/snapshots/old_syntax/multiline_str_in_closure_in_when_guard_wtf.md
index 69438da3f5..2c0f73d8d7 100644
--- a/src/snapshots/old_syntax/multiline_str_in_closure_in_when_guard_wtf.md
+++ b/src/snapshots/old_syntax/multiline_str_in_closure_in_when_guard_wtf.md
@@ -10,9 +10,12 @@ is
 s if\t->""""""->e
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - multiline_str_in_closure_in_when_guard_wtf.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),LowerIdent(1:6-1:7),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/multiline_str_opt_field.md b/src/snapshots/old_syntax/multiline_str_opt_field.md
index 1420008580..695bd9c07e 100644
--- a/src/snapshots/old_syntax/multiline_str_opt_field.md
+++ b/src/snapshots/old_syntax/multiline_str_opt_field.md
@@ -11,7 +11,6 @@ type=expr
 UNEXPECTED TOKEN IN EXPRESSION - multiline_str_opt_field.md:1:4:1:7
 UNEXPECTED TOKEN IN EXPRESSION - multiline_str_opt_field.md:1:7:1:10
 UNEXPECTED TOKEN IN EXPRESSION - multiline_str_opt_field.md:1:7:1:11
-not_implemented - multiline_str_opt_field.md:1:1:1:1
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **"""** is not expected in an expression.
@@ -49,6 +48,10 @@ Here is the problematic code:
       ^^^^
 
 
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize suffix_single_question expression
+Let us know if you want to help!
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),LowerIdent(1:2-1:3),NoSpaceOpQuestion(1:3-1:4),MultilineStringStart(1:4-1:7),StringPart(1:7-1:7),MultilineStringEnd(1:7-1:10),CloseCurly(1:10-1:11),StringStart(1:11-1:12),StringPart(1:12-1:12),StringEnd(1:12-1:13),EndOfFile(1:13-1:13),
diff --git a/src/snapshots/old_syntax/multiline_str_pnc_apply_in_assignment_newline.md b/src/snapshots/old_syntax/multiline_str_pnc_apply_in_assignment_newline.md
index 1093faea9b..54cccfb646 100644
--- a/src/snapshots/old_syntax/multiline_str_pnc_apply_in_assignment_newline.md
+++ b/src/snapshots/old_syntax/multiline_str_pnc_apply_in_assignment_newline.md
@@ -9,7 +9,7 @@ type=expr
 e)m
 ~~~
 # EXPECTED
-expected_expr_close_round_or_comma - multiline_str_pnc_apply_in_assignment_newline.md:1:11:1:14
+PARSE ERROR - multiline_str_pnc_apply_in_assignment_newline.md:1:11:1:14
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `expected_expr_close_round_or_comma`
diff --git a/src/snapshots/old_syntax/multiline_str_pnc_apply_in_assignment_record_access_newline.md b/src/snapshots/old_syntax/multiline_str_pnc_apply_in_assignment_record_access_newline.md
index 18f81123d7..bc92c20ea7 100644
--- a/src/snapshots/old_syntax/multiline_str_pnc_apply_in_assignment_record_access_newline.md
+++ b/src/snapshots/old_syntax/multiline_str_pnc_apply_in_assignment_record_access_newline.md
@@ -9,9 +9,12 @@ i=""""""().1
 p
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - multiline_str_pnc_apply_in_assignment_record_access_newline.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `i` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpAssign(1:2-1:3),MultilineStringStart(1:3-1:6),StringPart(1:6-1:6),MultilineStringEnd(1:6-1:9),NoSpaceOpenRound(1:9-1:10),CloseRound(1:10-1:11),NoSpaceDotInt(1:11-1:13),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/multiline_string.md b/src/snapshots/old_syntax/multiline_string.md
index 59cedb87c3..026b6abdbe 100644
--- a/src/snapshots/old_syntax/multiline_string.md
+++ b/src/snapshots/old_syntax/multiline_string.md
@@ -16,9 +16,12 @@ c =
 42
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - multiline_string.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `a` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpAssign(1:3-1:4),StringStart(1:5-1:6),StringPart(1:6-1:22),StringEnd(1:22-1:23),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/multiline_string_in_apply.md b/src/snapshots/old_syntax/multiline_string_in_apply.md
index ff293fcadd..dbdf5a0a28 100644
--- a/src/snapshots/old_syntax/multiline_string_in_apply.md
+++ b/src/snapshots/old_syntax/multiline_string_in_apply.md
@@ -8,9 +8,12 @@ type=expr
 e""""\""""
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - multiline_string_in_apply.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `e` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),MultilineStringStart(1:2-1:5),StringPart(1:5-1:8),MultilineStringEnd(1:8-1:11),EndOfFile(1:11-1:11),
diff --git a/src/snapshots/old_syntax/multiline_type_signature.md b/src/snapshots/old_syntax/multiline_type_signature.md
index 33ccf66955..7601f7c75f 100644
--- a/src/snapshots/old_syntax/multiline_type_signature.md
+++ b/src/snapshots/old_syntax/multiline_type_signature.md
@@ -11,9 +11,12 @@ f :
 42
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - multiline_type_signature.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/multiline_type_signature_with_comment.md b/src/snapshots/old_syntax/multiline_type_signature_with_comment.md
index 73d33189eb..405299252a 100644
--- a/src/snapshots/old_syntax/multiline_type_signature_with_comment.md
+++ b/src/snapshots/old_syntax/multiline_type_signature_with_comment.md
@@ -11,9 +11,12 @@ f :# comment
 42
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - multiline_type_signature_with_comment.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),Newline(1:5-1:13),
diff --git a/src/snapshots/old_syntax/multiple_fields.md b/src/snapshots/old_syntax/multiple_fields.md
index a4a931b96a..141037d6e8 100644
--- a/src/snapshots/old_syntax/multiple_fields.md
+++ b/src/snapshots/old_syntax/multiple_fields.md
@@ -8,9 +8,12 @@ type=expr
 rec.abc.def.ghi
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - multiple_fields.md:1:1:1:4
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `rec` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:4),NoSpaceDotLowerIdent(1:4-1:8),NoSpaceDotLowerIdent(1:8-1:12),NoSpaceDotLowerIdent(1:12-1:16),EndOfFile(1:16-1:16),
diff --git a/src/snapshots/old_syntax/neg_float_literal_pnc_apply_pat.md b/src/snapshots/old_syntax/neg_float_literal_pnc_apply_pat.md
index df883debc5..a7db444d7d 100644
--- a/src/snapshots/old_syntax/neg_float_literal_pnc_apply_pat.md
+++ b/src/snapshots/old_syntax/neg_float_literal_pnc_apply_pat.md
@@ -10,7 +10,7 @@ p
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - neg_float_literal_pnc_apply_pat.md:1:2:1:4
-expected_expr_close_round_or_comma - neg_float_literal_pnc_apply_pat.md:1:5:1:7
+PARSE ERROR - neg_float_literal_pnc_apply_pat.md:1:5:1:7
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **-8** is not expected in an expression.
diff --git a/src/snapshots/old_syntax/negative_in_apply_def.md b/src/snapshots/old_syntax/negative_in_apply_def.md
index fe097c6679..f68a5de6e7 100644
--- a/src/snapshots/old_syntax/negative_in_apply_def.md
+++ b/src/snapshots/old_syntax/negative_in_apply_def.md
@@ -10,9 +10,12 @@ a=A
 a
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - negative_in_apply_def.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `a` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpAssign(1:2-1:3),UpperIdent(1:3-1:4),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/nested_if.md b/src/snapshots/old_syntax/nested_if.md
index 8d8fc4616b..5a69a60609 100644
--- a/src/snapshots/old_syntax/nested_if.md
+++ b/src/snapshots/old_syntax/nested_if.md
@@ -13,6 +13,7 @@ else
   3
 ~~~
 # EXPECTED
+PARSE ERROR - nested_if.md:2:3:2:3
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `no_else`
diff --git a/src/snapshots/old_syntax/nested_if_unindented.md b/src/snapshots/old_syntax/nested_if_unindented.md
index e10f287087..86385b6786 100644
--- a/src/snapshots/old_syntax/nested_if_unindented.md
+++ b/src/snapshots/old_syntax/nested_if_unindented.md
@@ -10,10 +10,6 @@ if""then-p else.e
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - nested_if_unindented.md:2:16:2:18
-UNDEFINED VARIABLE - nested_if_unindented.md:1:5:1:9
-UNDEFINED VARIABLE - nested_if_unindented.md:1:10:1:11
-UNDEFINED VARIABLE - nested_if_unindented.md:2:5:2:9
-UNDEFINED VARIABLE - nested_if_unindented.md:2:10:2:11
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **.e** is not expected in an expression.
@@ -27,6 +23,29 @@ if""then-p else.e
                ^^
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `then` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `p` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `then` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `p` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**INVALID IF BRANCH**
+The `else` branch of this `if` expression could not be processed.
+
+The `else` branch must contain a valid expression. Check for syntax errors or missing values.
+
+Note: Every `if` expression in Roc must have an `else` branch, and both branches must have the same type.
+
 **INVALID IF CONDITION**
 This `if` condition needs to be a _Bool_:
 **nested_if_unindented.md:1:3:**
diff --git a/src/snapshots/old_syntax/nested_parens_in_pattern.md b/src/snapshots/old_syntax/nested_parens_in_pattern.md
index be5c56abf3..b7a4fe3ea8 100644
--- a/src/snapshots/old_syntax/nested_parens_in_pattern.md
+++ b/src/snapshots/old_syntax/nested_parens_in_pattern.md
@@ -9,7 +9,7 @@ type=expr
 i
 ~~~
 # EXPECTED
-expected_expr_close_round_or_comma - nested_parens_in_pattern.md:1:6:1:8
+PARSE ERROR - nested_parens_in_pattern.md:1:6:1:8
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `expected_expr_close_round_or_comma`
diff --git a/src/snapshots/old_syntax/nested_when_comment_in_pat.md b/src/snapshots/old_syntax/nested_when_comment_in_pat.md
index 4ccf03cf59..51f67eec88 100644
--- a/src/snapshots/old_syntax/nested_when_comment_in_pat.md
+++ b/src/snapshots/old_syntax/nested_when_comment_in_pat.md
@@ -11,9 +11,12 @@ O#
 1->O
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - nested_when_comment_in_pat.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),Int(1:6-1:7),LowerIdent(1:8-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/nested_when_expect_binop_when.md b/src/snapshots/old_syntax/nested_when_expect_binop_when.md
index a5fc5ced22..fdac6fb0eb 100644
--- a/src/snapshots/old_syntax/nested_when_expect_binop_when.md
+++ b/src/snapshots/old_syntax/nested_when_expect_binop_when.md
@@ -11,9 +11,12 @@ z->expect!%when s
 is z->q
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - nested_when_expect_binop_when.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),LowerIdent(1:6-1:7),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/newline_after_equals.md b/src/snapshots/old_syntax/newline_after_equals.md
index 534344f177..5038ffa014 100644
--- a/src/snapshots/old_syntax/newline_after_equals.md
+++ b/src/snapshots/old_syntax/newline_after_equals.md
@@ -11,9 +11,12 @@ x =
 42
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - newline_after_equals.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpAssign(1:3-1:4),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/newline_after_opt_field.md b/src/snapshots/old_syntax/newline_after_opt_field.md
index 3a4637ede4..eeba59ae4a 100644
--- a/src/snapshots/old_syntax/newline_after_opt_field.md
+++ b/src/snapshots/old_syntax/newline_after_opt_field.md
@@ -9,10 +9,16 @@ type=expr
 p}
 ~~~
 # EXPECTED
-not_implemented - newline_after_opt_field.md:1:1:1:1
-UNDEFINED VARIABLE - newline_after_opt_field.md:2:1:2:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize suffix_single_question expression
+Let us know if you want to help!
+
+**UNDEFINED VARIABLE**
+Nothing is named `p` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),LowerIdent(1:2-1:3),NoSpaceOpQuestion(1:3-1:4),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/newline_and_spaces_before_less_than.md b/src/snapshots/old_syntax/newline_and_spaces_before_less_than.md
index 3d35cb78a1..2e4165882c 100644
--- a/src/snapshots/old_syntax/newline_and_spaces_before_less_than.md
+++ b/src/snapshots/old_syntax/newline_and_spaces_before_less_than.md
@@ -11,9 +11,12 @@ x = 1
 42
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - newline_and_spaces_before_less_than.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpAssign(1:3-1:4),Int(1:5-1:6),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/newline_before_operator_with_defs.md b/src/snapshots/old_syntax/newline_before_operator_with_defs.md
index 2d394159c4..f2ee78fc0c 100644
--- a/src/snapshots/old_syntax/newline_before_operator_with_defs.md
+++ b/src/snapshots/old_syntax/newline_before_operator_with_defs.md
@@ -9,8 +9,7 @@ type=expr
 ==(Q:c 42)
 ~~~
 # EXPECTED
-expected_expr_close_round_or_comma - newline_before_operator_with_defs.md:2:10:2:11
-expr_not_canonicalized - newline_before_operator_with_defs.md:1:1:2:11
+PARSE ERROR - newline_before_operator_with_defs.md:2:10:2:11
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `expected_expr_close_round_or_comma`
@@ -24,6 +23,10 @@ Here is the problematic code:
          ^
 
 
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
 # TOKENS
 ~~~zig
 Int(1:1-1:2),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/not_record_updater.md b/src/snapshots/old_syntax/not_record_updater.md
index c26a28de08..a59b5ef06b 100644
--- a/src/snapshots/old_syntax/not_record_updater.md
+++ b/src/snapshots/old_syntax/not_record_updater.md
@@ -10,9 +10,12 @@ e
 &s
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - not_record_updater.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `e` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/number_literal_suffixes.md b/src/snapshots/old_syntax/number_literal_suffixes.md
index 02e6252cc2..34bde6c241 100644
--- a/src/snapshots/old_syntax/number_literal_suffixes.md
+++ b/src/snapshots/old_syntax/number_literal_suffixes.md
@@ -41,40 +41,104 @@ type=expr
 }
 ~~~
 # EXPECTED
-invalid_num_literal - number_literal_suffixes.md:2:9:2:14
-invalid_num_literal - number_literal_suffixes.md:3:9:3:15
-invalid_num_literal - number_literal_suffixes.md:4:9:4:15
-invalid_num_literal - number_literal_suffixes.md:5:9:5:15
-invalid_num_literal - number_literal_suffixes.md:6:9:6:16
-invalid_num_literal - number_literal_suffixes.md:7:9:7:14
-invalid_num_literal - number_literal_suffixes.md:8:9:8:15
-invalid_num_literal - number_literal_suffixes.md:9:9:9:15
-invalid_num_literal - number_literal_suffixes.md:10:9:10:15
-invalid_num_literal - number_literal_suffixes.md:11:9:11:16
-invalid_num_literal - number_literal_suffixes.md:12:9:12:15
-invalid_num_literal - number_literal_suffixes.md:13:12:13:18
-invalid_num_literal - number_literal_suffixes.md:14:12:14:19
-invalid_num_literal - number_literal_suffixes.md:15:12:15:19
-invalid_num_literal - number_literal_suffixes.md:16:12:16:19
-invalid_num_literal - number_literal_suffixes.md:17:12:17:20
-invalid_num_literal - number_literal_suffixes.md:18:12:18:18
-invalid_num_literal - number_literal_suffixes.md:19:12:19:19
-invalid_num_literal - number_literal_suffixes.md:20:12:20:19
-invalid_num_literal - number_literal_suffixes.md:21:12:21:19
-invalid_num_literal - number_literal_suffixes.md:22:12:22:20
-invalid_num_literal - number_literal_suffixes.md:23:12:23:19
-invalid_num_literal - number_literal_suffixes.md:24:12:24:19
-invalid_num_literal - number_literal_suffixes.md:25:12:25:20
-invalid_num_literal - number_literal_suffixes.md:26:12:26:20
-invalid_num_literal - number_literal_suffixes.md:27:12:27:20
-invalid_num_literal - number_literal_suffixes.md:28:12:28:21
-invalid_num_literal - number_literal_suffixes.md:29:12:29:19
-invalid_num_literal - number_literal_suffixes.md:30:12:30:20
-invalid_num_literal - number_literal_suffixes.md:31:12:31:20
-invalid_num_literal - number_literal_suffixes.md:32:12:32:20
-invalid_num_literal - number_literal_suffixes.md:33:12:33:21
-# PROBLEMS
 NIL
+# PROBLEMS
+**INVALID NUMBER**
+This number literal is not valid: 123u8
+
+**INVALID NUMBER**
+This number literal is not valid: 123u16
+
+**INVALID NUMBER**
+This number literal is not valid: 123u32
+
+**INVALID NUMBER**
+This number literal is not valid: 123u64
+
+**INVALID NUMBER**
+This number literal is not valid: 123u128
+
+**INVALID NUMBER**
+This number literal is not valid: 123i8
+
+**INVALID NUMBER**
+This number literal is not valid: 123i16
+
+**INVALID NUMBER**
+This number literal is not valid: 123i32
+
+**INVALID NUMBER**
+This number literal is not valid: 123i64
+
+**INVALID NUMBER**
+This number literal is not valid: 123i128
+
+**INVALID NUMBER**
+This number literal is not valid: 123dec
+
+**INVALID NUMBER**
+This number literal is not valid: -123u8
+
+**INVALID NUMBER**
+This number literal is not valid: -123u16
+
+**INVALID NUMBER**
+This number literal is not valid: -123u32
+
+**INVALID NUMBER**
+This number literal is not valid: -123u64
+
+**INVALID NUMBER**
+This number literal is not valid: -123u128
+
+**INVALID NUMBER**
+This number literal is not valid: -123i8
+
+**INVALID NUMBER**
+This number literal is not valid: -123i16
+
+**INVALID NUMBER**
+This number literal is not valid: -123i32
+
+**INVALID NUMBER**
+This number literal is not valid: -123i64
+
+**INVALID NUMBER**
+This number literal is not valid: -123i128
+
+**INVALID NUMBER**
+This number literal is not valid: -123dec
+
+**INVALID NUMBER**
+This number literal is not valid: 0b101u8
+
+**INVALID NUMBER**
+This number literal is not valid: 0b101u16
+
+**INVALID NUMBER**
+This number literal is not valid: 0b101u32
+
+**INVALID NUMBER**
+This number literal is not valid: 0b101u64
+
+**INVALID NUMBER**
+This number literal is not valid: 0b101u128
+
+**INVALID NUMBER**
+This number literal is not valid: 0b101i8
+
+**INVALID NUMBER**
+This number literal is not valid: 0b101i16
+
+**INVALID NUMBER**
+This number literal is not valid: 0b101i32
+
+**INVALID NUMBER**
+This number literal is not valid: 0b101i64
+
+**INVALID NUMBER**
+This number literal is not valid: 0b101i128
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/opaque_reference_pattern.md b/src/snapshots/old_syntax/opaque_reference_pattern.md
index 871367997c..1b1143a1c7 100644
--- a/src/snapshots/old_syntax/opaque_reference_pattern.md
+++ b/src/snapshots/old_syntax/opaque_reference_pattern.md
@@ -9,9 +9,12 @@ when n is
   @Age -> 1
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - opaque_reference_pattern.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),LowerIdent(1:6-1:7),LowerIdent(1:8-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/opaque_reference_pattern_with_arguments.md b/src/snapshots/old_syntax/opaque_reference_pattern_with_arguments.md
index 81c2c698dd..cd44db325e 100644
--- a/src/snapshots/old_syntax/opaque_reference_pattern_with_arguments.md
+++ b/src/snapshots/old_syntax/opaque_reference_pattern_with_arguments.md
@@ -9,9 +9,12 @@ when n is
   @Add n m -> n + m
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - opaque_reference_pattern_with_arguments.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),LowerIdent(1:6-1:7),LowerIdent(1:8-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/opaque_type_def_with_newline.md b/src/snapshots/old_syntax/opaque_type_def_with_newline.md
index ad7e5a455d..3bf2f132cd 100644
--- a/src/snapshots/old_syntax/opaque_type_def_with_newline.md
+++ b/src/snapshots/old_syntax/opaque_type_def_with_newline.md
@@ -10,9 +10,12 @@ Na:=
  e e0
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - opaque_type_def_with_newline.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `a` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:2-1:3),LowerIdent(1:3-1:4),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/opt_field_newline_in_pat.md b/src/snapshots/old_syntax/opt_field_newline_in_pat.md
index 0c4c78376d..cbb8d40648 100644
--- a/src/snapshots/old_syntax/opt_field_newline_in_pat.md
+++ b/src/snapshots/old_syntax/opt_field_newline_in_pat.md
@@ -11,10 +11,16 @@ Y}=p
 Q
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - opt_field_newline_in_pat.md:1:2:1:3
-not_implemented - opt_field_newline_in_pat.md:1:2:3:3
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `i` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: binop
+Let us know if you want to help!
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),LowerIdent(1:2-1:3),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/opt_record_field_pat_assign.md b/src/snapshots/old_syntax/opt_record_field_pat_assign.md
index d20d092820..addb62082b 100644
--- a/src/snapshots/old_syntax/opt_record_field_pat_assign.md
+++ b/src/snapshots/old_syntax/opt_record_field_pat_assign.md
@@ -11,10 +11,16 @@ type=expr
 r
 ~~~
 # EXPECTED
-not_implemented - opt_record_field_pat_assign.md:1:1:1:1
-UNDEFINED VARIABLE - opt_record_field_pat_assign.md:1:4:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize suffix_single_question expression
+Let us know if you want to help!
+
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),LowerIdent(1:2-1:3),NoSpaceOpQuestion(1:3-1:4),LowerIdent(1:4-1:5),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/outdented_app_with_record.md b/src/snapshots/old_syntax/outdented_app_with_record.md
index 7c9b2007da..f1309fc6c6 100644
--- a/src/snapshots/old_syntax/outdented_app_with_record.md
+++ b/src/snapshots/old_syntax/outdented_app_with_record.md
@@ -11,9 +11,12 @@ x = foo (baz {
 x
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - outdented_app_with_record.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpAssign(1:3-1:4),LowerIdent(1:5-1:8),OpenRound(1:9-1:10),LowerIdent(1:10-1:13),OpenCurly(1:14-1:15),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/outdented_colon_in_record.md b/src/snapshots/old_syntax/outdented_colon_in_record.md
index 04a4c9fde9..2a65d04845 100644
--- a/src/snapshots/old_syntax/outdented_colon_in_record.md
+++ b/src/snapshots/old_syntax/outdented_colon_in_record.md
@@ -13,9 +13,12 @@ blah
 x
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - outdented_colon_in_record.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpAssign(1:3-1:4),LowerIdent(1:5-1:8),OpenCurly(1:9-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/outdented_list.md b/src/snapshots/old_syntax/outdented_list.md
index 5cc93f4206..e76707dcc0 100644
--- a/src/snapshots/old_syntax/outdented_list.md
+++ b/src/snapshots/old_syntax/outdented_list.md
@@ -11,9 +11,12 @@ a = [
 a
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - outdented_list.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `a` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpAssign(1:3-1:4),OpenSquare(1:5-1:6),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/outdented_record.md b/src/snapshots/old_syntax/outdented_record.md
index 3c1ce8d2e5..d83123e417 100644
--- a/src/snapshots/old_syntax/outdented_record.md
+++ b/src/snapshots/old_syntax/outdented_record.md
@@ -11,9 +11,12 @@ x = foo {
 x
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - outdented_record.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpAssign(1:3-1:4),LowerIdent(1:5-1:8),OpenCurly(1:9-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/p_return_f_minus_f.md b/src/snapshots/old_syntax/p_return_f_minus_f.md
index fbc6ed26dc..a4e1d32393 100644
--- a/src/snapshots/old_syntax/p_return_f_minus_f.md
+++ b/src/snapshots/old_syntax/p_return_f_minus_f.md
@@ -11,9 +11,12 @@ return#
  -f
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - p_return_f_minus_f.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `p` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/paren_newline_before_return.md b/src/snapshots/old_syntax/paren_newline_before_return.md
index 6be3ca69f6..72e60ca738 100644
--- a/src/snapshots/old_syntax/paren_newline_before_return.md
+++ b/src/snapshots/old_syntax/paren_newline_before_return.md
@@ -11,9 +11,12 @@ type=expr
 return u
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - paren_newline_before_return.md:1:2:1:3
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `i` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenRound(1:1-1:2),LowerIdent(1:2-1:3),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/parens_apply_newline.md b/src/snapshots/old_syntax/parens_apply_newline.md
index 565d7a7d82..337ae5a506 100644
--- a/src/snapshots/old_syntax/parens_apply_newline.md
+++ b/src/snapshots/old_syntax/parens_apply_newline.md
@@ -10,6 +10,7 @@ N)
 N#
 ~~~
 # EXPECTED
+PARSE ERROR - parens_apply_newline.md:2:2:2:2
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `expected_expr_close_round_or_comma`
diff --git a/src/snapshots/old_syntax/parens_apply_not_parens.md b/src/snapshots/old_syntax/parens_apply_not_parens.md
index a5a052ab45..08ea523695 100644
--- a/src/snapshots/old_syntax/parens_apply_not_parens.md
+++ b/src/snapshots/old_syntax/parens_apply_not_parens.md
@@ -10,7 +10,7 @@ type=expr
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - parens_apply_not_parens.md:1:2:1:4
-expected_expr_close_round_or_comma - parens_apply_not_parens.md:2:1:2:3
+PARSE ERROR - parens_apply_not_parens.md:2:1:2:3
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **!(** is not expected in an expression.
diff --git a/src/snapshots/old_syntax/parens_comment_in_str_interpolation.md b/src/snapshots/old_syntax/parens_comment_in_str_interpolation.md
index c84b31a554..e6476ac512 100644
--- a/src/snapshots/old_syntax/parens_comment_in_str_interpolation.md
+++ b/src/snapshots/old_syntax/parens_comment_in_str_interpolation.md
@@ -9,8 +9,7 @@ type=expr
 )}"
 ~~~
 # EXPECTED
-expected_expr_close_round_or_comma - parens_comment_in_str_interpolation.md:2:1:2:3
-invalid_string_interpolation - parens_comment_in_str_interpolation.md:2:1:2:3
+PARSE ERROR - parens_comment_in_str_interpolation.md:2:1:2:3
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `expected_expr_close_round_or_comma`
@@ -24,6 +23,10 @@ Here is the problematic code:
 ^^
 
 
+**INVALID INTERPOLATION**
+This string interpolation is not valid.
+String interpolation should use the format: "text $(expression) more text"
+
 # TOKENS
 ~~~zig
 StringStart(1:1-1:2),StringPart(1:2-1:2),OpenStringInterpolation(1:2-1:4),NoSpaceOpenRound(1:4-1:5),UpperIdent(1:5-1:6),Newline(1:7-1:7),
diff --git a/src/snapshots/old_syntax/parens_func_apply_type.md b/src/snapshots/old_syntax/parens_func_apply_type.md
index 8a7e08f1be..ea708c9bd6 100644
--- a/src/snapshots/old_syntax/parens_func_apply_type.md
+++ b/src/snapshots/old_syntax/parens_func_apply_type.md
@@ -9,9 +9,12 @@ si:(e)(e->A)
 A
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - parens_func_apply_type.md:1:1:1:3
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `si` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:3),OpColon(1:3-1:4),NoSpaceOpenRound(1:4-1:5),LowerIdent(1:5-1:6),CloseRound(1:6-1:7),NoSpaceOpenRound(1:7-1:8),LowerIdent(1:8-1:9),OpArrow(1:9-1:11),UpperIdent(1:11-1:12),CloseRound(1:12-1:13),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/parenthetical_apply.md b/src/snapshots/old_syntax/parenthetical_apply.md
index e87f318f4d..6b49b5ef44 100644
--- a/src/snapshots/old_syntax/parenthetical_apply.md
+++ b/src/snapshots/old_syntax/parenthetical_apply.md
@@ -8,9 +8,12 @@ type=expr
 (whee) 1
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - parenthetical_apply.md:1:2:1:6
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `whee` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenRound(1:1-1:2),LowerIdent(1:2-1:6),CloseRound(1:6-1:7),Int(1:8-1:9),EndOfFile(1:9-1:9),
diff --git a/src/snapshots/old_syntax/parenthetical_basic_field.md b/src/snapshots/old_syntax/parenthetical_basic_field.md
index cf6aba9e3f..3fe5e8eae5 100644
--- a/src/snapshots/old_syntax/parenthetical_basic_field.md
+++ b/src/snapshots/old_syntax/parenthetical_basic_field.md
@@ -8,9 +8,12 @@ type=expr
 (rec).field
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - parenthetical_basic_field.md:1:2:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `rec` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenRound(1:1-1:2),LowerIdent(1:2-1:5),CloseRound(1:5-1:6),NoSpaceDotLowerIdent(1:6-1:12),EndOfFile(1:12-1:12),
diff --git a/src/snapshots/old_syntax/parenthetical_field_qualified_var.md b/src/snapshots/old_syntax/parenthetical_field_qualified_var.md
index e722e4a81b..060d86ac42 100644
--- a/src/snapshots/old_syntax/parenthetical_field_qualified_var.md
+++ b/src/snapshots/old_syntax/parenthetical_field_qualified_var.md
@@ -8,9 +8,12 @@ type=expr
 (One.Two.rec).field
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - parenthetical_field_qualified_var.md:1:2:1:13
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `rec` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenRound(1:1-1:2),UpperIdent(1:2-1:5),NoSpaceDotUpperIdent(1:5-1:9),NoSpaceDotLowerIdent(1:9-1:13),CloseRound(1:13-1:14),NoSpaceDotLowerIdent(1:14-1:20),EndOfFile(1:20-1:20),
diff --git a/src/snapshots/old_syntax/parenthetical_var.md b/src/snapshots/old_syntax/parenthetical_var.md
index f7322d4191..1b6ede577d 100644
--- a/src/snapshots/old_syntax/parenthetical_var.md
+++ b/src/snapshots/old_syntax/parenthetical_var.md
@@ -8,9 +8,12 @@ type=expr
 (whee)
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - parenthetical_var.md:1:2:1:6
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `whee` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenRound(1:1-1:2),LowerIdent(1:2-1:6),CloseRound(1:6-1:7),EndOfFile(1:7-1:7),
diff --git a/src/snapshots/old_syntax/parse_as_ann.md b/src/snapshots/old_syntax/parse_as_ann.md
index 9d53153bde..3150094d13 100644
--- a/src/snapshots/old_syntax/parse_as_ann.md
+++ b/src/snapshots/old_syntax/parse_as_ann.md
@@ -10,9 +10,12 @@ foo : Foo.Bar.Baz x y as Blah a b
 42
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - parse_as_ann.md:1:1:1:4
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `foo` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:4),OpColon(1:5-1:6),UpperIdent(1:7-1:10),NoSpaceDotUpperIdent(1:10-1:14),NoSpaceDotUpperIdent(1:14-1:18),LowerIdent(1:19-1:20),LowerIdent(1:21-1:22),KwAs(1:23-1:25),UpperIdent(1:26-1:30),LowerIdent(1:31-1:32),LowerIdent(1:33-1:34),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/pat_parens_newline_before_pipe_when.md b/src/snapshots/old_syntax/pat_parens_newline_before_pipe_when.md
index 09c2c728f1..7e6ef911c4 100644
--- a/src/snapshots/old_syntax/pat_parens_newline_before_pipe_when.md
+++ b/src/snapshots/old_syntax/pat_parens_newline_before_pipe_when.md
@@ -11,9 +11,12 @@ is S#
 )|B->e
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - pat_parens_newline_before_pipe_when.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),Int(1:6-1:7),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/pat_space_after_comma.md b/src/snapshots/old_syntax/pat_space_after_comma.md
index 50a97114cf..776cc63e7f 100644
--- a/src/snapshots/old_syntax/pat_space_after_comma.md
+++ b/src/snapshots/old_syntax/pat_space_after_comma.md
@@ -10,10 +10,16 @@ type=expr
 Q
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - pat_space_after_comma.md:1:2:2:2
-UNDEFINED VARIABLE - pat_space_after_comma.md:2:2:2:4
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `i` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `p` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),LowerIdent(1:2-1:3),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/pattern_as.md b/src/snapshots/old_syntax/pattern_as.md
index a0ff0256d9..fa1a7b9c23 100644
--- a/src/snapshots/old_syntax/pattern_as.md
+++ b/src/snapshots/old_syntax/pattern_as.md
@@ -9,9 +9,12 @@ when 0 is
     _ as n -> n
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - pattern_as.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),Int(1:6-1:7),LowerIdent(1:8-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/pattern_as_list_rest.md b/src/snapshots/old_syntax/pattern_as_list_rest.md
index 8b9867bd37..39d6bbfd85 100644
--- a/src/snapshots/old_syntax/pattern_as_list_rest.md
+++ b/src/snapshots/old_syntax/pattern_as_list_rest.md
@@ -9,9 +9,12 @@ when myList is
     [first, .. as rest] -> 0
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - pattern_as_list_rest.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),LowerIdent(1:6-1:12),LowerIdent(1:13-1:15),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/pattern_as_spaces.md b/src/snapshots/old_syntax/pattern_as_spaces.md
index 5070d184a1..ae051705e3 100644
--- a/src/snapshots/old_syntax/pattern_as_spaces.md
+++ b/src/snapshots/old_syntax/pattern_as_spaces.md
@@ -11,9 +11,12 @@ when 0 is
         n -> {}
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - pattern_as_spaces.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),Int(1:6-1:7),LowerIdent(1:8-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/pattern_binds_keyword.md b/src/snapshots/old_syntax/pattern_binds_keyword.md
index 8361e5e32c..b55522d3c3 100644
--- a/src/snapshots/old_syntax/pattern_binds_keyword.md
+++ b/src/snapshots/old_syntax/pattern_binds_keyword.md
@@ -13,9 +13,12 @@ when Just 4 is
         2
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - pattern_binds_keyword.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),UpperIdent(1:6-1:10),Int(1:11-1:12),LowerIdent(1:13-1:15),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/pattern_comma_newlines.md b/src/snapshots/old_syntax/pattern_comma_newlines.md
index 099d23c193..26775a8f90 100644
--- a/src/snapshots/old_syntax/pattern_comma_newlines.md
+++ b/src/snapshots/old_syntax/pattern_comma_newlines.md
@@ -10,9 +10,16 @@ type=expr
 n
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - pattern_comma_newlines.md:1:3:1:4
-UNDEFINED VARIABLE - pattern_comma_newlines.md:1:5:1:6
+UNDEFINED VARIABLE - pattern_comma_newlines.md:1:1:1:2
 # PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `i` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `p` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 **TYPE MISMATCH**
 This expression is used in an unexpected way:
 **pattern_comma_newlines.md:1:1:1:2:**
diff --git a/src/snapshots/old_syntax/pattern_record_apply_comment.md b/src/snapshots/old_syntax/pattern_record_apply_comment.md
index 00700489ff..8927142f15 100644
--- a/src/snapshots/old_syntax/pattern_record_apply_comment.md
+++ b/src/snapshots/old_syntax/pattern_record_apply_comment.md
@@ -10,9 +10,12 @@ s{t#
 p#
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - pattern_record_apply_comment.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `s` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpenCurly(1:2-1:3),LowerIdent(1:3-1:4),Newline(1:5-1:5),
diff --git a/src/snapshots/old_syntax/pattern_with_as_parens.md b/src/snapshots/old_syntax/pattern_with_as_parens.md
index 6053f9a498..678b6fdb4b 100644
--- a/src/snapshots/old_syntax/pattern_with_as_parens.md
+++ b/src/snapshots/old_syntax/pattern_with_as_parens.md
@@ -9,9 +9,12 @@ when t is
     Ok ({} as d)->S
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - pattern_with_as_parens.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),LowerIdent(1:6-1:7),LowerIdent(1:8-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/pattern_with_space_in_parens.md b/src/snapshots/old_syntax/pattern_with_space_in_parens.md
index 54ff292835..3ca7244e56 100644
--- a/src/snapshots/old_syntax/pattern_with_space_in_parens.md
+++ b/src/snapshots/old_syntax/pattern_with_space_in_parens.md
@@ -9,9 +9,12 @@ when Delmin (Del rx) 0 is
     Delmin (Del ry ) _ -> Node Black 0 Bool.false ry
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - pattern_with_space_in_parens.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),UpperIdent(1:6-1:12),OpenRound(1:13-1:14),UpperIdent(1:14-1:17),LowerIdent(1:18-1:20),CloseRound(1:20-1:21),Int(1:22-1:23),LowerIdent(1:24-1:26),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/plus_if.md b/src/snapshots/old_syntax/plus_if.md
index 3c08d9b663..028f516fbe 100644
--- a/src/snapshots/old_syntax/plus_if.md
+++ b/src/snapshots/old_syntax/plus_if.md
@@ -8,8 +8,7 @@ type=expr
 1 * if Bool.true then 1 else 1
 ~~~
 # EXPECTED
-no_else - plus_if.md:1:23:1:29
-expr_not_canonicalized - plus_if.md:1:1:1:29
+PARSE ERROR - plus_if.md:1:23:1:29
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `no_else`
@@ -23,6 +22,10 @@ Here is the problematic code:
                       ^^^^^^
 
 
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
 # TOKENS
 ~~~zig
 Int(1:1-1:2),OpStar(1:3-1:4),KwIf(1:5-1:7),UpperIdent(1:8-1:12),NoSpaceDotLowerIdent(1:12-1:17),LowerIdent(1:18-1:22),Int(1:23-1:24),KwElse(1:25-1:29),Int(1:30-1:31),EndOfFile(1:31-1:31),
diff --git a/src/snapshots/old_syntax/plus_when.md b/src/snapshots/old_syntax/plus_when.md
index 8c86836036..d8c20ddcef 100644
--- a/src/snapshots/old_syntax/plus_when.md
+++ b/src/snapshots/old_syntax/plus_when.md
@@ -11,9 +11,12 @@ type=expr
         Bar -> 3
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - plus_when.md:2:5:2:9
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 Int(1:1-1:2),OpPlus(1:3-1:4),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/pnc_apply_comment_after_newline.md b/src/snapshots/old_syntax/pnc_apply_comment_after_newline.md
index 70be01b2fa..6cedbb34f5 100644
--- a/src/snapshots/old_syntax/pnc_apply_comment_after_newline.md
+++ b/src/snapshots/old_syntax/pnc_apply_comment_after_newline.md
@@ -9,10 +9,16 @@ i(i,
 )t
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - pnc_apply_comment_after_newline.md:1:1:1:2
-UNDEFINED VARIABLE - pnc_apply_comment_after_newline.md:1:3:1:4
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `i` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `i` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),NoSpaceOpenRound(1:2-1:3),LowerIdent(1:3-1:4),Comma(1:4-1:5),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/pnc_apply_neg_pattern.md b/src/snapshots/old_syntax/pnc_apply_neg_pattern.md
index 7c5d63c881..028b47bf6c 100644
--- a/src/snapshots/old_syntax/pnc_apply_neg_pattern.md
+++ b/src/snapshots/old_syntax/pnc_apply_neg_pattern.md
@@ -10,7 +10,7 @@ type=expr
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - pnc_apply_neg_pattern.md:1:2:1:4
-expected_expr_close_round_or_comma - pnc_apply_neg_pattern.md:1:4:1:6
+PARSE ERROR - pnc_apply_neg_pattern.md:1:4:1:6
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **-8** is not expected in an expression.
diff --git a/src/snapshots/old_syntax/pnc_dbg_parens_comment.md b/src/snapshots/old_syntax/pnc_dbg_parens_comment.md
index 504112ff7a..c6763297d9 100644
--- a/src/snapshots/old_syntax/pnc_dbg_parens_comment.md
+++ b/src/snapshots/old_syntax/pnc_dbg_parens_comment.md
@@ -10,9 +10,12 @@ type=expr
 e
 ~~~
 # EXPECTED
-not_implemented - pnc_dbg_parens_comment.md:1:1:1:1
-# PROBLEMS
 NIL
+# PROBLEMS
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize dbg expression
+Let us know if you want to help!
+
 # TOKENS
 ~~~zig
 OpenRound(1:1-1:2),KwDbg(1:2-1:5),NoSpaceOpenRound(1:5-1:6),Int(1:6-1:7),Newline(1:8-1:8),
diff --git a/src/snapshots/old_syntax/pnc_parens_apply_etc.md b/src/snapshots/old_syntax/pnc_parens_apply_etc.md
index 3451afe6b7..a2f89dc29a 100644
--- a/src/snapshots/old_syntax/pnc_parens_apply_etc.md
+++ b/src/snapshots/old_syntax/pnc_parens_apply_etc.md
@@ -10,7 +10,7 @@ type=expr
 (z)
 ~~~
 # EXPECTED
-NIL
+TYPE MISMATCH - pnc_parens_apply_etc.md:2:1:2:2
 # PROBLEMS
 **TYPE MISMATCH**
 This expression is used in an unexpected way:
diff --git a/src/snapshots/old_syntax/pos_inf_float.md b/src/snapshots/old_syntax/pos_inf_float.md
index f8cb245600..606a9fa54e 100644
--- a/src/snapshots/old_syntax/pos_inf_float.md
+++ b/src/snapshots/old_syntax/pos_inf_float.md
@@ -8,9 +8,12 @@ type=expr
 inf
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - pos_inf_float.md:1:1:1:4
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `inf` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:4),EndOfFile(1:4-1:4),
diff --git a/src/snapshots/old_syntax/qualified_field.md b/src/snapshots/old_syntax/qualified_field.md
index 5670a2629e..9a1d55adbf 100644
--- a/src/snapshots/old_syntax/qualified_field.md
+++ b/src/snapshots/old_syntax/qualified_field.md
@@ -8,9 +8,12 @@ type=expr
 One.Two.rec.abc.def.ghi
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - qualified_field.md:1:1:1:24
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `ghi` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 UpperIdent(1:1-1:4),NoSpaceDotUpperIdent(1:4-1:8),NoSpaceDotLowerIdent(1:8-1:12),NoSpaceDotLowerIdent(1:12-1:16),NoSpaceDotLowerIdent(1:16-1:20),NoSpaceDotLowerIdent(1:20-1:24),EndOfFile(1:24-1:24),
diff --git a/src/snapshots/old_syntax/qualified_var.md b/src/snapshots/old_syntax/qualified_var.md
index c49aaacb58..4342ba4e42 100644
--- a/src/snapshots/old_syntax/qualified_var.md
+++ b/src/snapshots/old_syntax/qualified_var.md
@@ -8,9 +8,12 @@ type=expr
 One.Two.whee
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - qualified_var.md:1:1:1:13
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `whee` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 UpperIdent(1:1-1:4),NoSpaceDotUpperIdent(1:4-1:8),NoSpaceDotLowerIdent(1:8-1:13),EndOfFile(1:13-1:13),
diff --git a/src/snapshots/old_syntax/record_access_after_tuple.md b/src/snapshots/old_syntax/record_access_after_tuple.md
index f739c1043f..c172823c27 100644
--- a/src/snapshots/old_syntax/record_access_after_tuple.md
+++ b/src/snapshots/old_syntax/record_access_after_tuple.md
@@ -8,7 +8,7 @@ type=expr
 ({a: 0}, {b: 1}).0.a
 ~~~
 # EXPECTED
-expr_no_space_dot_int - record_access_after_tuple.md:1:17:1:21
+PARSE ERROR - record_access_after_tuple.md:1:17:1:21
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `expr_no_space_dot_int`
diff --git a/src/snapshots/old_syntax/record_builder.md b/src/snapshots/old_syntax/record_builder.md
index f4980b2a8a..df97439cf5 100644
--- a/src/snapshots/old_syntax/record_builder.md
+++ b/src/snapshots/old_syntax/record_builder.md
@@ -12,9 +12,8 @@ type=expr
 UNEXPECTED TOKEN IN EXPRESSION - record_builder.md:1:15:1:19
 UNEXPECTED TOKEN IN TYPE ANNOTATION - record_builder.md:1:21:1:23
 UNEXPECTED TOKEN IN EXPRESSION - record_builder.md:1:22:1:25
+UNEXPECTED TOKEN IN TYPE ANNOTATION - record_builder.md:1:27:1:27
 UNEXPECTED TOKEN IN EXPRESSION - record_builder.md:1:1:2:2
-UNDEFINED VARIABLE - record_builder.md:1:3:1:14
-MALFORMED TYPE - record_builder.md:1:21:1:23
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **<- x** is not expected in an expression.
@@ -77,6 +76,16 @@ Here is the problematic code:
 ```
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `baz` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**MALFORMED TYPE**
+This type annotation is malformed or contains invalid syntax.
+
+**MALFORMED TYPE**
+This type annotation is malformed or contains invalid syntax.
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),UpperIdent(1:3-1:6),NoSpaceDotUpperIdent(1:6-1:10),NoSpaceDotLowerIdent(1:10-1:14),OpBackArrow(1:15-1:17),LowerIdent(1:18-1:19),OpColon(1:19-1:20),Int(1:21-1:22),Comma(1:22-1:23),LowerIdent(1:24-1:25),OpColon(1:25-1:26),Int(1:27-1:28),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/record_builder_ignored_fields.md b/src/snapshots/old_syntax/record_builder_ignored_fields.md
index beffdac10f..9adf22aea8 100644
--- a/src/snapshots/old_syntax/record_builder_ignored_fields.md
+++ b/src/snapshots/old_syntax/record_builder_ignored_fields.md
@@ -18,10 +18,6 @@ UNEXPECTED TOKEN IN TYPE ANNOTATION - record_builder_ignored_fields.md:1:34:1:36
 UNEXPECTED TOKEN IN EXPRESSION - record_builder_ignored_fields.md:1:35:1:38
 UNEXPECTED TOKEN IN EXPRESSION - record_builder_ignored_fields.md:1:37:1:39
 UNEXPECTED TOKEN IN EXPRESSION - record_builder_ignored_fields.md:1:38:1:41
-UNDEFINED VARIABLE - record_builder_ignored_fields.md:1:3:1:14
-MALFORMED TYPE - record_builder_ignored_fields.md:1:21:1:23
-MALFORMED TYPE - record_builder_ignored_fields.md:1:27:1:29
-MALFORMED TYPE - record_builder_ignored_fields.md:1:34:1:36
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **<- x** is not expected in an expression.
@@ -131,6 +127,19 @@ Here is the problematic code:
                                      ^^^
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `baz` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**MALFORMED TYPE**
+This type annotation is malformed or contains invalid syntax.
+
+**MALFORMED TYPE**
+This type annotation is malformed or contains invalid syntax.
+
+**MALFORMED TYPE**
+This type annotation is malformed or contains invalid syntax.
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),UpperIdent(1:3-1:6),NoSpaceDotUpperIdent(1:6-1:10),NoSpaceDotLowerIdent(1:10-1:14),OpBackArrow(1:15-1:17),LowerIdent(1:18-1:19),OpColon(1:19-1:20),Int(1:21-1:22),Comma(1:22-1:23),LowerIdent(1:24-1:25),OpColon(1:25-1:26),Int(1:27-1:28),Comma(1:28-1:29),NamedUnderscore(1:30-1:32),OpColon(1:32-1:33),Int(1:34-1:35),Comma(1:35-1:36),Underscore(1:37-1:38),OpColon(1:38-1:39),Int(1:40-1:41),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/record_comment_newline_field.md b/src/snapshots/old_syntax/record_comment_newline_field.md
index 9b09fd18ce..352e438d08 100644
--- a/src/snapshots/old_syntax/record_comment_newline_field.md
+++ b/src/snapshots/old_syntax/record_comment_newline_field.md
@@ -9,9 +9,12 @@ type=expr
 a}
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - record_comment_newline_field.md:2:1:2:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `a` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),Newline(1:3-1:3),
diff --git a/src/snapshots/old_syntax/record_destructure_field_bang.md b/src/snapshots/old_syntax/record_destructure_field_bang.md
index f8a1108560..04beb37b6e 100644
--- a/src/snapshots/old_syntax/record_destructure_field_bang.md
+++ b/src/snapshots/old_syntax/record_destructure_field_bang.md
@@ -10,10 +10,16 @@ type=expr
 launchTheNukes! code
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - record_destructure_field_bang.md:1:2:1:18
-UNDEFINED VARIABLE - record_destructure_field_bang.md:1:19:1:24
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `launchTheNukes!` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `code` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),LowerIdent(1:2-1:17),Comma(1:17-1:18),LowerIdent(1:19-1:23),CloseCurly(1:23-1:24),OpAssign(1:25-1:26),LowerIdent(1:27-1:33),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/record_destructure_field_bang_no_space.md b/src/snapshots/old_syntax/record_destructure_field_bang_no_space.md
index a5af3f4557..f4a20aa756 100644
--- a/src/snapshots/old_syntax/record_destructure_field_bang_no_space.md
+++ b/src/snapshots/old_syntax/record_destructure_field_bang_no_space.md
@@ -10,10 +10,16 @@ type=expr
 launchTheNukes! code
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - record_destructure_field_bang_no_space.md:1:2:1:23
-UNDEFINED VARIABLE - record_destructure_field_bang_no_space.md:1:24:1:29
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `launchTheNukes!wrong` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `code` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),LowerIdent(1:2-1:22),Comma(1:22-1:23),LowerIdent(1:24-1:28),CloseCurly(1:28-1:29),OpAssign(1:30-1:31),LowerIdent(1:32-1:38),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/record_func_type_decl.md b/src/snapshots/old_syntax/record_func_type_decl.md
index b7fd30d1f5..2714be086d 100644
--- a/src/snapshots/old_syntax/record_func_type_decl.md
+++ b/src/snapshots/old_syntax/record_func_type_decl.md
@@ -16,9 +16,12 @@ f :
 42
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - record_func_type_decl.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/record_literal_field_bang.md b/src/snapshots/old_syntax/record_literal_field_bang.md
index 04121afae3..b352bbfadc 100644
--- a/src/snapshots/old_syntax/record_literal_field_bang.md
+++ b/src/snapshots/old_syntax/record_literal_field_bang.md
@@ -12,7 +12,7 @@ type=expr
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - record_literal_field_bang.md:3:22:3:24
-expected_expr_close_curly_or_comma - record_literal_field_bang.md:3:23:3:25
+PARSE ERROR - record_literal_field_bang.md:3:23:3:25
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **\{** is not expected in an expression.
diff --git a/src/snapshots/old_syntax/record_type_end.md b/src/snapshots/old_syntax/record_type_end.md
index 5143720b2f..98513d2cc4 100644
--- a/src/snapshots/old_syntax/record_type_end.md
+++ b/src/snapshots/old_syntax/record_type_end.md
@@ -8,9 +8,12 @@ type=expr
 f : { a: Int,
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - record_type_end.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),OpenCurly(1:5-1:6),LowerIdent(1:7-1:8),OpColon(1:8-1:9),UpperIdent(1:10-1:13),Comma(1:13-1:14),EndOfFile(1:14-1:14),
diff --git a/src/snapshots/old_syntax/record_type_keyword_field_name.md b/src/snapshots/old_syntax/record_type_keyword_field_name.md
index 6debb858c1..acc1ff2c0b 100644
--- a/src/snapshots/old_syntax/record_type_keyword_field_name.md
+++ b/src/snapshots/old_syntax/record_type_keyword_field_name.md
@@ -8,9 +8,12 @@ type=expr
 f : { if : I64 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - record_type_keyword_field_name.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),OpenCurly(1:5-1:6),KwIf(1:7-1:9),OpColon(1:10-1:11),UpperIdent(1:12-1:15),CloseCurly(1:16-1:17),EndOfFile(1:17-1:17),
diff --git a/src/snapshots/old_syntax/record_type_missing_comma.md b/src/snapshots/old_syntax/record_type_missing_comma.md
index d628e22514..c91c09c0c3 100644
--- a/src/snapshots/old_syntax/record_type_missing_comma.md
+++ b/src/snapshots/old_syntax/record_type_missing_comma.md
@@ -8,9 +8,12 @@ type=expr
 f : { foo  bar }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - record_type_missing_comma.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),OpenCurly(1:5-1:6),LowerIdent(1:7-1:10),LowerIdent(1:12-1:15),CloseCurly(1:16-1:17),EndOfFile(1:17-1:17),
diff --git a/src/snapshots/old_syntax/record_type_open.md b/src/snapshots/old_syntax/record_type_open.md
index 429487a321..76e37ca851 100644
--- a/src/snapshots/old_syntax/record_type_open.md
+++ b/src/snapshots/old_syntax/record_type_open.md
@@ -8,9 +8,12 @@ type=expr
 f : {
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - record_type_open.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),OpenCurly(1:5-1:6),EndOfFile(1:6-1:6),
diff --git a/src/snapshots/old_syntax/record_type_open_indent.md b/src/snapshots/old_syntax/record_type_open_indent.md
index d64fa69951..5852cff1d2 100644
--- a/src/snapshots/old_syntax/record_type_open_indent.md
+++ b/src/snapshots/old_syntax/record_type_open_indent.md
@@ -9,9 +9,12 @@ f : {
 foo : I64,
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - record_type_open_indent.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),OpenCurly(1:5-1:6),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/record_type_tab.md b/src/snapshots/old_syntax/record_type_tab.md
index a287290f00..97c1ee0342 100644
--- a/src/snapshots/old_syntax/record_type_tab.md
+++ b/src/snapshots/old_syntax/record_type_tab.md
@@ -8,9 +8,12 @@ type=expr
 f : { foo 	 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - record_type_tab.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),OpenCurly(1:5-1:6),LowerIdent(1:7-1:10),CloseCurly(1:13-1:14),EndOfFile(1:14-1:14),
diff --git a/src/snapshots/old_syntax/record_type_with_function.md b/src/snapshots/old_syntax/record_type_with_function.md
index 7bf5060053..ba05d89165 100644
--- a/src/snapshots/old_syntax/record_type_with_function.md
+++ b/src/snapshots/old_syntax/record_type_with_function.md
@@ -10,9 +10,12 @@ x : { init : {} -> Model, update : Model, Str -> Model, view : Model -> Str }
 42
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - record_type_with_function.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),OpenCurly(1:5-1:6),LowerIdent(1:7-1:11),OpColon(1:12-1:13),OpenCurly(1:14-1:15),CloseCurly(1:15-1:16),OpArrow(1:17-1:19),UpperIdent(1:20-1:25),Comma(1:25-1:26),LowerIdent(1:27-1:33),OpColon(1:34-1:35),UpperIdent(1:36-1:41),Comma(1:41-1:42),UpperIdent(1:43-1:46),OpArrow(1:47-1:49),UpperIdent(1:50-1:55),Comma(1:55-1:56),LowerIdent(1:57-1:61),OpColon(1:62-1:63),UpperIdent(1:64-1:69),OpArrow(1:70-1:72),UpperIdent(1:73-1:76),CloseCurly(1:77-1:78),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/record_update.md b/src/snapshots/old_syntax/record_update.md
index 0b6c1c4d06..9d88dd5601 100644
--- a/src/snapshots/old_syntax/record_update.md
+++ b/src/snapshots/old_syntax/record_update.md
@@ -12,9 +12,6 @@ UNEXPECTED TOKEN IN EXPRESSION - record_update.md:1:15:1:18
 UNEXPECTED TOKEN IN TYPE ANNOTATION - record_update.md:1:20:1:22
 UNEXPECTED TOKEN IN EXPRESSION - record_update.md:1:21:1:24
 UNEXPECTED TOKEN IN TYPE ANNOTATION - record_update.md:1:26:1:29
-UNDEFINED VARIABLE - record_update.md:1:3:1:14
-MALFORMED TYPE - record_update.md:1:20:1:22
-MALFORMED TYPE - record_update.md:1:26:1:29
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **& x** is not expected in an expression.
@@ -64,6 +61,16 @@ Here is the problematic code:
                          ^^^
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `baz` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**MALFORMED TYPE**
+This type annotation is malformed or contains invalid syntax.
+
+**MALFORMED TYPE**
+This type annotation is malformed or contains invalid syntax.
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),UpperIdent(1:3-1:6),NoSpaceDotUpperIdent(1:6-1:10),NoSpaceDotLowerIdent(1:10-1:14),OpAmpersand(1:15-1:16),LowerIdent(1:17-1:18),OpColon(1:18-1:19),Int(1:20-1:21),Comma(1:21-1:22),LowerIdent(1:23-1:24),OpColon(1:24-1:25),Int(1:26-1:27),CloseCurly(1:28-1:29),EndOfFile(1:29-1:29),
diff --git a/src/snapshots/old_syntax/record_update_apply_closure_comments.md b/src/snapshots/old_syntax/record_update_apply_closure_comments.md
index 578f80beb1..c6bd5f935a 100644
--- a/src/snapshots/old_syntax/record_update_apply_closure_comments.md
+++ b/src/snapshots/old_syntax/record_update_apply_closure_comments.md
@@ -11,7 +11,6 @@ h&}\#
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - record_update_apply_closure_comments.md:2:2:2:4
-UNDEFINED VARIABLE - record_update_apply_closure_comments.md:2:1:2:2
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **&}** is not expected in an expression.
@@ -25,6 +24,10 @@ h&}\#
  ^^
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `h` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),Newline(1:3-1:3),
diff --git a/src/snapshots/old_syntax/record_update_comment_before_ampersand.md b/src/snapshots/old_syntax/record_update_comment_before_ampersand.md
index a409f6511c..0f15492669 100644
--- a/src/snapshots/old_syntax/record_update_comment_before_ampersand.md
+++ b/src/snapshots/old_syntax/record_update_comment_before_ampersand.md
@@ -10,7 +10,6 @@ type=expr
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - record_update_comment_before_ampersand.md:2:1:2:3
-UNDEFINED VARIABLE - record_update_comment_before_ampersand.md:1:2:1:3
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **&}** is not expected in an expression.
@@ -24,6 +23,10 @@ Here is the problematic code:
 ^^
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `i` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),LowerIdent(1:2-1:3),Newline(1:4-1:4),
diff --git a/src/snapshots/old_syntax/record_updater_literal_apply.md b/src/snapshots/old_syntax/record_updater_literal_apply.md
index 347d538059..d61ba808c4 100644
--- a/src/snapshots/old_syntax/record_updater_literal_apply.md
+++ b/src/snapshots/old_syntax/record_updater_literal_apply.md
@@ -12,9 +12,12 @@ data =
 data
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - record_updater_literal_apply.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `data` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),OpAssign(1:6-1:7),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/record_updater_var_apply.md b/src/snapshots/old_syntax/record_updater_var_apply.md
index 2728eb61c6..6ca70c0b44 100644
--- a/src/snapshots/old_syntax/record_updater_var_apply.md
+++ b/src/snapshots/old_syntax/record_updater_var_apply.md
@@ -8,9 +8,12 @@ type=expr
 foo&bar  5
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - record_updater_var_apply.md:1:1:1:4
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `foo` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:4),OpAmpersand(1:4-1:5),LowerIdent(1:5-1:8),Int(1:10-1:11),EndOfFile(1:11-1:11),
diff --git a/src/snapshots/old_syntax/record_with_if.md b/src/snapshots/old_syntax/record_with_if.md
index 95bad92b27..2898e63479 100644
--- a/src/snapshots/old_syntax/record_with_if.md
+++ b/src/snapshots/old_syntax/record_with_if.md
@@ -8,8 +8,8 @@ type=expr
 {x : if Bool.true then 1 else 2, y: 3 }
 ~~~
 # EXPECTED
-no_else - record_with_if.md:1:24:1:30
-expected_expr_close_curly_or_comma - record_with_if.md:1:26:1:32
+PARSE ERROR - record_with_if.md:1:24:1:30
+PARSE ERROR - record_with_if.md:1:26:1:32
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `no_else`
diff --git a/src/snapshots/old_syntax/record_with_lots_of_newlines.md b/src/snapshots/old_syntax/record_with_lots_of_newlines.md
index 767362e6ca..6a350b3d73 100644
--- a/src/snapshots/old_syntax/record_with_lots_of_newlines.md
+++ b/src/snapshots/old_syntax/record_with_lots_of_newlines.md
@@ -11,9 +11,12 @@ type=expr
 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - record_with_lots_of_newlines.md:1:2:2:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `t` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),LowerIdent(1:2-1:3),Newline(1:4-1:4),
diff --git a/src/snapshots/old_syntax/repr_7342.md b/src/snapshots/old_syntax/repr_7342.md
index 36aaa06f99..1f9d4430ab 100644
--- a/src/snapshots/old_syntax/repr_7342.md
+++ b/src/snapshots/old_syntax/repr_7342.md
@@ -10,7 +10,7 @@ type=expr
 n)
 ~~~
 # EXPECTED
-expected_expr_close_round_or_comma - repr_7342.md:3:2:3:3
+PARSE ERROR - repr_7342.md:3:2:3:3
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `expected_expr_close_round_or_comma`
diff --git a/src/snapshots/old_syntax/repr_7346.md b/src/snapshots/old_syntax/repr_7346.md
index eeac74a546..3b6fc77452 100644
--- a/src/snapshots/old_syntax/repr_7346.md
+++ b/src/snapshots/old_syntax/repr_7346.md
@@ -11,9 +11,12 @@ t!K):i
  C
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - repr_7346.md:1:1:1:4
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `il3` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:4),OpBackslash(1:4-1:5),LowerIdent(1:5-1:6),OpArrow(1:6-1:8),Newline(1:9-1:12),
diff --git a/src/snapshots/old_syntax/return_as_single_line_expr.md b/src/snapshots/old_syntax/return_as_single_line_expr.md
index 26537c5998..3540c54db2 100644
--- a/src/snapshots/old_syntax/return_as_single_line_expr.md
+++ b/src/snapshots/old_syntax/return_as_single_line_expr.md
@@ -8,9 +8,12 @@ type=expr
 x = return 5
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - return_as_single_line_expr.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpAssign(1:3-1:4),KwReturn(1:5-1:11),Int(1:12-1:13),EndOfFile(1:13-1:13),
diff --git a/src/snapshots/old_syntax/return_field_access_in_parens.md b/src/snapshots/old_syntax/return_field_access_in_parens.md
index d671f800f5..b3ff89d5f1 100644
--- a/src/snapshots/old_syntax/return_field_access_in_parens.md
+++ b/src/snapshots/old_syntax/return_field_access_in_parens.md
@@ -10,6 +10,7 @@ ss
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - return_field_access_in_parens.md:1:2:1:10
+PARSE ERROR - return_field_access_in_parens.md:1:10:1:10
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **return.o** is not expected in an expression.
diff --git a/src/snapshots/old_syntax/return_in_apply_func.md b/src/snapshots/old_syntax/return_in_apply_func.md
index d2b90682f2..89b0b5a6a2 100644
--- a/src/snapshots/old_syntax/return_in_apply_func.md
+++ b/src/snapshots/old_syntax/return_in_apply_func.md
@@ -10,7 +10,7 @@ return-3e)g
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - return_in_apply_func.md:2:1:2:8
-expected_expr_close_round_or_comma - return_in_apply_func.md:2:10:2:12
+PARSE ERROR - return_in_apply_func.md:2:10:2:12
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **return-** is not expected in an expression.
diff --git a/src/snapshots/old_syntax/return_in_if.md b/src/snapshots/old_syntax/return_in_if.md
index 24a4268fda..4e5025257a 100644
--- a/src/snapshots/old_syntax/return_in_if.md
+++ b/src/snapshots/old_syntax/return_in_if.md
@@ -17,9 +17,12 @@ maybeEarlyReturn = \x ->
 maybeEarlyReturn 10
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - return_in_if.md:1:1:1:17
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `maybeEarlyReturn` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:17),OpAssign(1:18-1:19),OpBackslash(1:20-1:21),LowerIdent(1:21-1:22),OpArrow(1:23-1:25),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/return_in_pat.md b/src/snapshots/old_syntax/return_in_pat.md
index 484c034961..d9e222fc89 100644
--- a/src/snapshots/old_syntax/return_in_pat.md
+++ b/src/snapshots/old_syntax/return_in_pat.md
@@ -11,7 +11,7 @@ t)=t
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - return_in_pat.md:2:1:2:9
-expected_expr_close_round_or_comma - return_in_pat.md:3:2:3:4
+PARSE ERROR - return_in_pat.md:3:2:3:4
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **return e** is not expected in an expression.
diff --git a/src/snapshots/old_syntax/return_in_static_def.md b/src/snapshots/old_syntax/return_in_static_def.md
index ebbc51b160..ee1a40b9e3 100644
--- a/src/snapshots/old_syntax/return_in_static_def.md
+++ b/src/snapshots/old_syntax/return_in_static_def.md
@@ -19,9 +19,12 @@ staticValueDef =
 staticValueDef
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - return_in_static_def.md:1:1:1:15
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `staticValueDef` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:15),OpAssign(1:16-1:17),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/return_in_when.md b/src/snapshots/old_syntax/return_in_when.md
index e280a0ea4a..57fb73bcd7 100644
--- a/src/snapshots/old_syntax/return_in_when.md
+++ b/src/snapshots/old_syntax/return_in_when.md
@@ -20,9 +20,12 @@ maybeEarlyReturn = \x ->
 maybeEarlyRetun 3
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - return_in_when.md:1:1:1:17
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `maybeEarlyReturn` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:17),OpAssign(1:18-1:19),OpBackslash(1:20-1:21),LowerIdent(1:21-1:22),OpArrow(1:23-1:25),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/return_only_statement.md b/src/snapshots/old_syntax/return_only_statement.md
index 310394fe31..269a613b01 100644
--- a/src/snapshots/old_syntax/return_only_statement.md
+++ b/src/snapshots/old_syntax/return_only_statement.md
@@ -12,9 +12,12 @@ identityFn = \x ->
 identityFn 45
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - return_only_statement.md:1:1:1:11
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `identityFn` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:11),OpAssign(1:12-1:13),OpBackslash(1:14-1:15),LowerIdent(1:15-1:16),OpArrow(1:17-1:19),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/single_no_end.md b/src/snapshots/old_syntax/single_no_end.md
index 6510047cc5..1f6fa8f7e6 100644
--- a/src/snapshots/old_syntax/single_no_end.md
+++ b/src/snapshots/old_syntax/single_no_end.md
@@ -8,7 +8,7 @@ type=expr
 "there is no end
 ~~~
 # EXPECTED
-UnclosedString - single_no_end.md:1:2:1:17
+NIL
 # PROBLEMS
 **UNCLOSED STRING**
 This string is missing a closing quote.
diff --git a/src/snapshots/old_syntax/single_question_binop_closure.md b/src/snapshots/old_syntax/single_question_binop_closure.md
index e78ca59b93..ed673e4c1e 100644
--- a/src/snapshots/old_syntax/single_question_binop_closure.md
+++ b/src/snapshots/old_syntax/single_question_binop_closure.md
@@ -9,11 +9,20 @@ fallible!(args)   ? |my_err|
     my_err * 2
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - single_question_binop_closure.md:1:1:1:10
-UNDEFINED VARIABLE - single_question_binop_closure.md:1:11:1:15
-not_implemented - single_question_binop_closure.md:1:1:2:15
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `fallible!` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `args` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: binop
+Let us know if you want to help!
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:10),NoSpaceOpenRound(1:10-1:11),LowerIdent(1:11-1:15),CloseRound(1:15-1:16),OpQuestion(1:19-1:20),OpBar(1:21-1:22),LowerIdent(1:22-1:28),OpBar(1:28-1:29),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/single_question_binop_tag.md b/src/snapshots/old_syntax/single_question_binop_tag.md
index 717292524b..34e09c3967 100644
--- a/src/snapshots/old_syntax/single_question_binop_tag.md
+++ b/src/snapshots/old_syntax/single_question_binop_tag.md
@@ -8,11 +8,20 @@ type=expr
 fallible!(args)   ? WrapOverErr
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - single_question_binop_tag.md:1:1:1:10
-UNDEFINED VARIABLE - single_question_binop_tag.md:1:11:1:15
-not_implemented - single_question_binop_tag.md:1:1:1:32
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `fallible!` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `args` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: binop
+Let us know if you want to help!
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:10),NoSpaceOpenRound(1:10-1:11),LowerIdent(1:11-1:15),CloseRound(1:15-1:16),OpQuestion(1:19-1:20),UpperIdent(1:21-1:32),EndOfFile(1:32-1:32),
diff --git a/src/snapshots/old_syntax/sneaky_and_expr.md b/src/snapshots/old_syntax/sneaky_and_expr.md
index ab5c1e5762..f81fac77da 100644
--- a/src/snapshots/old_syntax/sneaky_and_expr.md
+++ b/src/snapshots/old_syntax/sneaky_and_expr.md
@@ -10,9 +10,12 @@ a
 d
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - sneaky_and_expr.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `a` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/space_after_opt_field_pat.md b/src/snapshots/old_syntax/space_after_opt_field_pat.md
index 6ce1828b9f..bc162290b4 100644
--- a/src/snapshots/old_syntax/space_after_opt_field_pat.md
+++ b/src/snapshots/old_syntax/space_after_opt_field_pat.md
@@ -10,10 +10,16 @@ m}:J
 O
 ~~~
 # EXPECTED
-not_implemented - space_after_opt_field_pat.md:1:1:1:1
-UNDEFINED VARIABLE - space_after_opt_field_pat.md:2:1:2:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize suffix_single_question expression
+Let us know if you want to help!
+
+**UNDEFINED VARIABLE**
+Nothing is named `m` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),LowerIdent(1:2-1:3),NoSpaceOpQuestion(1:3-1:4),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/space_before_parens_space_after.md b/src/snapshots/old_syntax/space_before_parens_space_after.md
index 6b5292c194..6fb163ea44 100644
--- a/src/snapshots/old_syntax/space_before_parens_space_after.md
+++ b/src/snapshots/old_syntax/space_before_parens_space_after.md
@@ -10,9 +10,12 @@ i
 )#(
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - space_before_parens_space_after.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `i` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/space_only_after_minus.md b/src/snapshots/old_syntax/space_only_after_minus.md
index a32faedd84..4685f64f9d 100644
--- a/src/snapshots/old_syntax/space_only_after_minus.md
+++ b/src/snapshots/old_syntax/space_only_after_minus.md
@@ -8,10 +8,16 @@ type=expr
 x- y
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - space_only_after_minus.md:1:1:1:2
-UNDEFINED VARIABLE - space_only_after_minus.md:1:4:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `y` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpBinaryMinus(1:2-1:3),LowerIdent(1:4-1:5),EndOfFile(1:5-1:5),
diff --git a/src/snapshots/old_syntax/stmt_parens_minus.md b/src/snapshots/old_syntax/stmt_parens_minus.md
index a9e6f8f457..dd06f608b1 100644
--- a/src/snapshots/old_syntax/stmt_parens_minus.md
+++ b/src/snapshots/old_syntax/stmt_parens_minus.md
@@ -9,9 +9,12 @@ i
 (-2)
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - stmt_parens_minus.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `i` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/str_over_large_unicode_escape.md b/src/snapshots/old_syntax/str_over_large_unicode_escape.md
index 6cd8469cce..585cac210d 100644
--- a/src/snapshots/old_syntax/str_over_large_unicode_escape.md
+++ b/src/snapshots/old_syntax/str_over_large_unicode_escape.md
@@ -8,9 +8,12 @@ type=expr
 '\u(FFFFFFFFF)'
 ~~~
 # EXPECTED
-too_long_single_quote - str_over_large_unicode_escape.md:1:1:1:16
-# PROBLEMS
 NIL
+# PROBLEMS
+**INVALID SCALAR**
+I am part way through parsing this scalar literal (character literal), but it contains more than one character.
+A single-quoted literal must contain exactly one character, e.g. 'a'.
+
 # TOKENS
 ~~~zig
 SingleQuote(1:1-1:16),EndOfFile(1:16-1:16),
diff --git a/src/snapshots/old_syntax/sub_minus_o_apply_minus_crash_bang.md b/src/snapshots/old_syntax/sub_minus_o_apply_minus_crash_bang.md
index 3b41dbb101..320a805fbc 100644
--- a/src/snapshots/old_syntax/sub_minus_o_apply_minus_crash_bang.md
+++ b/src/snapshots/old_syntax/sub_minus_o_apply_minus_crash_bang.md
@@ -10,8 +10,6 @@ h-
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - sub_minus_o_apply_minus_crash_bang.md:2:1:2:3
-UNDEFINED VARIABLE - sub_minus_o_apply_minus_crash_bang.md:1:1:1:2
-expr_not_canonicalized - sub_minus_o_apply_minus_crash_bang.md:1:1:2:3
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **-o** is not expected in an expression.
@@ -25,6 +23,14 @@ Here is the problematic code:
 ^^
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `h` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpBinaryMinus(1:2-1:3),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/sub_var_with_spaces.md b/src/snapshots/old_syntax/sub_var_with_spaces.md
index 38e8a1392d..efd414c230 100644
--- a/src/snapshots/old_syntax/sub_var_with_spaces.md
+++ b/src/snapshots/old_syntax/sub_var_with_spaces.md
@@ -8,9 +8,12 @@ type=expr
 x - 2
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - sub_var_with_spaces.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpBinaryMinus(1:3-1:4),Int(1:5-1:6),EndOfFile(1:6-1:6),
diff --git a/src/snapshots/old_syntax/suffixed_question.md b/src/snapshots/old_syntax/suffixed_question.md
index dec98943fc..2eeb38f770 100644
--- a/src/snapshots/old_syntax/suffixed_question.md
+++ b/src/snapshots/old_syntax/suffixed_question.md
@@ -9,8 +9,6 @@ Stdout.line???
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - suffixed_question.md:1:14:1:15
-UNDEFINED VARIABLE - suffixed_question.md:1:1:1:12
-expr_not_canonicalized - suffixed_question.md:1:1:1:15
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **?** is not expected in an expression.
@@ -24,6 +22,14 @@ Stdout.line???
              ^
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `line` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
 # TOKENS
 ~~~zig
 UpperIdent(1:1-1:7),NoSpaceDotLowerIdent(1:7-1:12),OpDoubleQuestion(1:12-1:14),NoSpaceOpQuestion(1:14-1:15),EndOfFile(1:15-1:15),
diff --git a/src/snapshots/old_syntax/suffixed_question_nested.md b/src/snapshots/old_syntax/suffixed_question_nested.md
index 27c3fa0710..be771525a9 100644
--- a/src/snapshots/old_syntax/suffixed_question_nested.md
+++ b/src/snapshots/old_syntax/suffixed_question_nested.md
@@ -8,9 +8,12 @@ type=expr
 foo?  (  bar? baz)  ( blah stuff)
 ~~~
 # EXPECTED
-not_implemented - suffixed_question_nested.md:1:1:1:1
-# PROBLEMS
 NIL
+# PROBLEMS
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize suffix_single_question expression
+Let us know if you want to help!
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:4),NoSpaceOpQuestion(1:4-1:5),OpenRound(1:7-1:8),LowerIdent(1:10-1:13),NoSpaceOpQuestion(1:13-1:14),LowerIdent(1:15-1:18),CloseRound(1:18-1:19),OpenRound(1:21-1:22),LowerIdent(1:23-1:27),LowerIdent(1:28-1:33),CloseRound(1:33-1:34),EndOfFile(1:34-1:34),
diff --git a/src/snapshots/old_syntax/tag_union_end.md b/src/snapshots/old_syntax/tag_union_end.md
index 238f29a2f0..56bc589e15 100644
--- a/src/snapshots/old_syntax/tag_union_end.md
+++ b/src/snapshots/old_syntax/tag_union_end.md
@@ -8,9 +8,12 @@ type=expr
 f : [Yes,
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - tag_union_end.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),OpenSquare(1:5-1:6),UpperIdent(1:6-1:9),Comma(1:9-1:10),EndOfFile(1:10-1:10),
diff --git a/src/snapshots/old_syntax/tag_union_functions_as.md b/src/snapshots/old_syntax/tag_union_functions_as.md
index e4056b2779..5ad0fa3395 100644
--- a/src/snapshots/old_syntax/tag_union_functions_as.md
+++ b/src/snapshots/old_syntax/tag_union_functions_as.md
@@ -10,9 +10,12 @@ main_for_host = main
 42
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - tag_union_functions_as.md:1:1:1:14
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `main_for_host` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:14),OpColon(1:15-1:16),OpenSquare(1:17-1:18),UpperIdent(1:18-1:29),UpperIdent(1:30-1:33),OpenRound(1:34-1:35),OpenCurly(1:35-1:36),CloseCurly(1:36-1:37),OpArrow(1:38-1:40),UpperIdent(1:41-1:43),CloseRound(1:43-1:44),Comma(1:44-1:45),UpperIdent(1:46-1:57),UpperIdent(1:58-1:61),OpenRound(1:62-1:63),OpenCurly(1:63-1:64),CloseCurly(1:64-1:65),OpArrow(1:66-1:68),UpperIdent(1:69-1:71),CloseRound(1:71-1:72),Comma(1:72-1:73),UpperIdent(1:74-1:78),CloseSquare(1:78-1:79),KwAs(1:80-1:82),UpperIdent(1:83-1:85),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/tag_union_lowercase_tag_name.md b/src/snapshots/old_syntax/tag_union_lowercase_tag_name.md
index 82b4481ddf..c56369d808 100644
--- a/src/snapshots/old_syntax/tag_union_lowercase_tag_name.md
+++ b/src/snapshots/old_syntax/tag_union_lowercase_tag_name.md
@@ -8,9 +8,12 @@ type=expr
 f : [lowercase]
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - tag_union_lowercase_tag_name.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),OpenSquare(1:5-1:6),LowerIdent(1:6-1:15),CloseSquare(1:15-1:16),EndOfFile(1:16-1:16),
diff --git a/src/snapshots/old_syntax/tag_union_open.md b/src/snapshots/old_syntax/tag_union_open.md
index bcc7f10eb2..29c2a89d3d 100644
--- a/src/snapshots/old_syntax/tag_union_open.md
+++ b/src/snapshots/old_syntax/tag_union_open.md
@@ -8,9 +8,12 @@ type=expr
 f : [
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - tag_union_open.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),OpenSquare(1:5-1:6),EndOfFile(1:6-1:6),
diff --git a/src/snapshots/old_syntax/tag_union_second_lowercase_tag_name.md b/src/snapshots/old_syntax/tag_union_second_lowercase_tag_name.md
index ab54e9a8ab..235ee6a956 100644
--- a/src/snapshots/old_syntax/tag_union_second_lowercase_tag_name.md
+++ b/src/snapshots/old_syntax/tag_union_second_lowercase_tag_name.md
@@ -8,9 +8,12 @@ type=expr
 f : [Good, bad]
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - tag_union_second_lowercase_tag_name.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),OpenSquare(1:5-1:6),UpperIdent(1:6-1:10),Comma(1:10-1:11),LowerIdent(1:12-1:15),CloseSquare(1:15-1:16),EndOfFile(1:16-1:16),
diff --git a/src/snapshots/old_syntax/trailing_operator.md b/src/snapshots/old_syntax/trailing_operator.md
index 27a9c586da..3c85137e42 100644
--- a/src/snapshots/old_syntax/trailing_operator.md
+++ b/src/snapshots/old_syntax/trailing_operator.md
@@ -9,7 +9,6 @@ J-
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - trailing_operator.md:1:3:1:3
-expr_not_canonicalized - trailing_operator.md:1:1:1:3
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token  is not expected in an expression.
@@ -23,6 +22,10 @@ J-
   
 
 
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
 # TOKENS
 ~~~zig
 UpperIdent(1:1-1:2),OpBinaryMinus(1:2-1:3),EndOfFile(1:3-1:3),
diff --git a/src/snapshots/old_syntax/triple_paren_pat_ann.md b/src/snapshots/old_syntax/triple_paren_pat_ann.md
index 8b6e810b6a..ee0bd75e2d 100644
--- a/src/snapshots/old_syntax/triple_paren_pat_ann.md
+++ b/src/snapshots/old_syntax/triple_paren_pat_ann.md
@@ -10,7 +10,8 @@ type=expr
 i
 ~~~
 # EXPECTED
-NIL
+TYPE MISMATCH - triple_paren_pat_ann.md:1:4:1:5
+TYPE MISMATCH - triple_paren_pat_ann.md:1:1:1:2
 # PROBLEMS
 **TYPE MISMATCH**
 This expression is used in an unexpected way:
diff --git a/src/snapshots/old_syntax/try_pipe_suffix.md b/src/snapshots/old_syntax/try_pipe_suffix.md
index e2f16a2290..5e1ad12b51 100644
--- a/src/snapshots/old_syntax/try_pipe_suffix.md
+++ b/src/snapshots/old_syntax/try_pipe_suffix.md
@@ -8,9 +8,12 @@ type=expr
 Str.toU64 "123"|> try
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - try_pipe_suffix.md:1:1:1:10
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `toU64` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 UpperIdent(1:1-1:4),NoSpaceDotLowerIdent(1:4-1:10),StringStart(1:11-1:12),StringPart(1:12-1:15),StringEnd(1:15-1:16),OpPizza(1:16-1:18),LowerIdent(1:19-1:22),EndOfFile(1:22-1:22),
diff --git a/src/snapshots/old_syntax/try_plain_prefix.md b/src/snapshots/old_syntax/try_plain_prefix.md
index b92cfc6917..8f08328405 100644
--- a/src/snapshots/old_syntax/try_plain_prefix.md
+++ b/src/snapshots/old_syntax/try_plain_prefix.md
@@ -8,9 +8,12 @@ type=expr
 try  Str.toU64  "123"
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - try_plain_prefix.md:1:1:1:4
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `try` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:4),UpperIdent(1:6-1:9),NoSpaceDotLowerIdent(1:9-1:15),StringStart(1:17-1:18),StringPart(1:18-1:21),StringEnd(1:21-1:22),EndOfFile(1:22-1:22),
diff --git a/src/snapshots/old_syntax/try_subtract.md b/src/snapshots/old_syntax/try_subtract.md
index 80e4de34e0..e0f4ddec12 100644
--- a/src/snapshots/old_syntax/try_subtract.md
+++ b/src/snapshots/old_syntax/try_subtract.md
@@ -8,10 +8,16 @@ type=expr
 try-w
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - try_subtract.md:1:1:1:4
-UNDEFINED VARIABLE - try_subtract.md:1:5:1:6
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `try` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `w` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:4),OpBinaryMinus(1:4-1:5),LowerIdent(1:5-1:6),EndOfFile(1:6-1:6),
diff --git a/src/snapshots/old_syntax/tuple_access_after_ident.md b/src/snapshots/old_syntax/tuple_access_after_ident.md
index 366d86a8d5..56d3e7fc72 100644
--- a/src/snapshots/old_syntax/tuple_access_after_ident.md
+++ b/src/snapshots/old_syntax/tuple_access_after_ident.md
@@ -9,9 +9,12 @@ abc = (1, 2, 3)
 abc.0
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - tuple_access_after_ident.md:1:1:1:4
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `abc` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:4),OpAssign(1:5-1:6),OpenRound(1:7-1:8),Int(1:8-1:9),Comma(1:9-1:10),Int(1:11-1:12),Comma(1:12-1:13),Int(1:14-1:15),CloseRound(1:15-1:16),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/tuple_access_after_record.md b/src/snapshots/old_syntax/tuple_access_after_record.md
index 60da2015ce..b451d30fc0 100644
--- a/src/snapshots/old_syntax/tuple_access_after_record.md
+++ b/src/snapshots/old_syntax/tuple_access_after_record.md
@@ -8,7 +8,7 @@ type=expr
 { a: (1, 2) }.a.0
 ~~~
 # EXPECTED
-expr_no_space_dot_int - tuple_access_after_record.md:1:16:1:18
+PARSE ERROR - tuple_access_after_record.md:1:16:1:18
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `expr_no_space_dot_int`
diff --git a/src/snapshots/old_syntax/tuple_apply_parens_comment.md b/src/snapshots/old_syntax/tuple_apply_parens_comment.md
index 8e4ec95c05..3ae036069d 100644
--- a/src/snapshots/old_syntax/tuple_apply_parens_comment.md
+++ b/src/snapshots/old_syntax/tuple_apply_parens_comment.md
@@ -9,8 +9,8 @@ type=expr
 L)L,L)#\
 ~~~
 # EXPECTED
-expected_expr_close_round_or_comma - tuple_apply_parens_comment.md:2:2:2:4
-expected_expr_close_round_or_comma - tuple_apply_parens_comment.md:2:6:2:9
+PARSE ERROR - tuple_apply_parens_comment.md:2:2:2:4
+PARSE ERROR - tuple_apply_parens_comment.md:2:6:2:9
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `expected_expr_close_round_or_comma`
diff --git a/src/snapshots/old_syntax/tuple_destructure_bang.md b/src/snapshots/old_syntax/tuple_destructure_bang.md
index 8a5620d991..dae2567bce 100644
--- a/src/snapshots/old_syntax/tuple_destructure_bang.md
+++ b/src/snapshots/old_syntax/tuple_destructure_bang.md
@@ -10,10 +10,16 @@ type=expr
 launchTheNukes! code
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - tuple_destructure_bang.md:1:2:1:17
-UNDEFINED VARIABLE - tuple_destructure_bang.md:1:19:1:23
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `launchTheNukes!` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `code` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenRound(1:1-1:2),LowerIdent(1:2-1:17),Comma(1:17-1:18),LowerIdent(1:19-1:23),CloseRound(1:23-1:24),OpAssign(1:25-1:26),LowerIdent(1:27-1:33),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/tuple_funcs_in_parens.md b/src/snapshots/old_syntax/tuple_funcs_in_parens.md
index bcfd5d2c04..d1058079b6 100644
--- a/src/snapshots/old_syntax/tuple_funcs_in_parens.md
+++ b/src/snapshots/old_syntax/tuple_funcs_in_parens.md
@@ -9,9 +9,12 @@ f: (a, b -> c, d -> e, g)
 f
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - tuple_funcs_in_parens.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:2-1:3),OpenRound(1:4-1:5),LowerIdent(1:5-1:6),Comma(1:6-1:7),LowerIdent(1:8-1:9),OpArrow(1:10-1:12),LowerIdent(1:13-1:14),Comma(1:14-1:15),LowerIdent(1:16-1:17),OpArrow(1:18-1:20),LowerIdent(1:21-1:22),Comma(1:22-1:23),LowerIdent(1:24-1:25),CloseRound(1:25-1:26),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/tuple_type.md b/src/snapshots/old_syntax/tuple_type.md
index 768dd20639..3af9b95156 100644
--- a/src/snapshots/old_syntax/tuple_type.md
+++ b/src/snapshots/old_syntax/tuple_type.md
@@ -11,9 +11,12 @@ f = \x -> x
 f (1, 2)
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - tuple_type.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:2-1:3),OpenRound(1:4-1:5),UpperIdent(1:5-1:8),Comma(1:8-1:9),UpperIdent(1:10-1:13),CloseRound(1:13-1:14),OpArrow(1:15-1:17),OpenRound(1:18-1:19),UpperIdent(1:19-1:22),Comma(1:22-1:23),UpperIdent(1:24-1:27),CloseRound(1:27-1:28),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/tuple_type_ext.md b/src/snapshots/old_syntax/tuple_type_ext.md
index be4b93c519..c99b0fc33b 100644
--- a/src/snapshots/old_syntax/tuple_type_ext.md
+++ b/src/snapshots/old_syntax/tuple_type_ext.md
@@ -11,9 +11,12 @@ f = \x -> x
 f (1, 2)
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - tuple_type_ext.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:2-1:3),OpenRound(1:4-1:5),UpperIdent(1:5-1:8),Comma(1:8-1:9),UpperIdent(1:10-1:13),CloseRound(1:13-1:14),LowerIdent(1:14-1:15),OpArrow(1:16-1:18),OpenRound(1:19-1:20),UpperIdent(1:20-1:23),Comma(1:23-1:24),UpperIdent(1:25-1:28),CloseRound(1:28-1:29),LowerIdent(1:29-1:30),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/tuples_parens_comments.md b/src/snapshots/old_syntax/tuples_parens_comments.md
index 06c9a522d6..49217db13c 100644
--- a/src/snapshots/old_syntax/tuples_parens_comments.md
+++ b/src/snapshots/old_syntax/tuples_parens_comments.md
@@ -13,7 +13,7 @@ type=expr
 ui)
 ~~~
 # EXPECTED
-expected_expr_close_round_or_comma - tuples_parens_comments.md:6:3:6:4
+PARSE ERROR - tuples_parens_comments.md:6:3:6:4
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `expected_expr_close_round_or_comma`
diff --git a/src/snapshots/old_syntax/two_branch_when.md b/src/snapshots/old_syntax/two_branch_when.md
index 1353e8a63a..d9ebb5a064 100644
--- a/src/snapshots/old_syntax/two_branch_when.md
+++ b/src/snapshots/old_syntax/two_branch_when.md
@@ -10,9 +10,12 @@ when x is
  "mise" -> 2
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - two_branch_when.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),LowerIdent(1:6-1:7),LowerIdent(1:8-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/type_annotation_double_colon.md b/src/snapshots/old_syntax/type_annotation_double_colon.md
index 078e78e9bf..03582b3f42 100644
--- a/src/snapshots/old_syntax/type_annotation_double_colon.md
+++ b/src/snapshots/old_syntax/type_annotation_double_colon.md
@@ -11,9 +11,12 @@ f = 42
 f
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - type_annotation_double_colon.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),OpColon(1:4-1:5),UpperIdent(1:6-1:9),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/type_apply_stray_dot.md b/src/snapshots/old_syntax/type_apply_stray_dot.md
index 72355fd451..0b208e8e9d 100644
--- a/src/snapshots/old_syntax/type_apply_stray_dot.md
+++ b/src/snapshots/old_syntax/type_apply_stray_dot.md
@@ -8,9 +8,12 @@ type=expr
 f : .
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - type_apply_stray_dot.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),Dot(1:5-1:6),EndOfFile(1:6-1:6),
diff --git a/src/snapshots/old_syntax/type_argument_arrow_then_nothing.md b/src/snapshots/old_syntax/type_argument_arrow_then_nothing.md
index bf624f9ab4..a8966985b2 100644
--- a/src/snapshots/old_syntax/type_argument_arrow_then_nothing.md
+++ b/src/snapshots/old_syntax/type_argument_arrow_then_nothing.md
@@ -11,9 +11,12 @@ f = 0
 f
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - type_argument_arrow_then_nothing.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),UpperIdent(1:5-1:8),Comma(1:8-1:9),UpperIdent(1:10-1:13),OpArrow(1:14-1:16),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/type_argument_no_arrow.md b/src/snapshots/old_syntax/type_argument_no_arrow.md
index afee82cc3f..29a82255a9 100644
--- a/src/snapshots/old_syntax/type_argument_no_arrow.md
+++ b/src/snapshots/old_syntax/type_argument_no_arrow.md
@@ -11,9 +11,12 @@ f = 0
 f
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - type_argument_no_arrow.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),UpperIdent(1:5-1:8),Comma(1:8-1:9),UpperIdent(1:10-1:13),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/type_decl_with_underscore.md b/src/snapshots/old_syntax/type_decl_with_underscore.md
index 811614a056..8c339e7b03 100644
--- a/src/snapshots/old_syntax/type_decl_with_underscore.md
+++ b/src/snapshots/old_syntax/type_decl_with_underscore.md
@@ -9,9 +9,12 @@ doStuff : UserId -> Dict Str _
 42
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - type_decl_with_underscore.md:1:1:1:8
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `doStuff` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:8),OpColon(1:9-1:10),UpperIdent(1:11-1:17),OpArrow(1:18-1:20),UpperIdent(1:21-1:25),UpperIdent(1:26-1:29),Underscore(1:30-1:31),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/type_double_comma.md b/src/snapshots/old_syntax/type_double_comma.md
index 03158733d3..50ea7928a6 100644
--- a/src/snapshots/old_syntax/type_double_comma.md
+++ b/src/snapshots/old_syntax/type_double_comma.md
@@ -11,9 +11,12 @@ f = 0
 f
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - type_double_comma.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),UpperIdent(1:5-1:8),Comma(1:8-1:9),Comma(1:9-1:10),UpperIdent(1:10-1:13),OpArrow(1:14-1:16),UpperIdent(1:17-1:20),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/type_in_parens_end.md b/src/snapshots/old_syntax/type_in_parens_end.md
index 4373b0c5c8..e4eac807ad 100644
--- a/src/snapshots/old_syntax/type_in_parens_end.md
+++ b/src/snapshots/old_syntax/type_in_parens_end.md
@@ -8,9 +8,12 @@ type=expr
 f : ( I64
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - type_in_parens_end.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),OpenRound(1:5-1:6),UpperIdent(1:7-1:10),EndOfFile(1:10-1:10),
diff --git a/src/snapshots/old_syntax/type_in_parens_start.md b/src/snapshots/old_syntax/type_in_parens_start.md
index 2a950db1ae..216416dfc8 100644
--- a/src/snapshots/old_syntax/type_in_parens_start.md
+++ b/src/snapshots/old_syntax/type_in_parens_start.md
@@ -8,9 +8,12 @@ type=expr
 f : (
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - type_in_parens_start.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),OpenRound(1:5-1:6),EndOfFile(1:6-1:6),
diff --git a/src/snapshots/old_syntax/type_inline_alias.md b/src/snapshots/old_syntax/type_inline_alias.md
index a1ff71fdf1..65c1b23006 100644
--- a/src/snapshots/old_syntax/type_inline_alias.md
+++ b/src/snapshots/old_syntax/type_inline_alias.md
@@ -11,9 +11,12 @@ f = 0
 f
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - type_inline_alias.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),UpperIdent(1:5-1:8),KwAs(1:9-1:11),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/type_signature_def.md b/src/snapshots/old_syntax/type_signature_def.md
index 75841d0f54..7b09cc9f4e 100644
--- a/src/snapshots/old_syntax/type_signature_def.md
+++ b/src/snapshots/old_syntax/type_signature_def.md
@@ -11,9 +11,12 @@ foo = 4
 42
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - type_signature_def.md:1:1:1:4
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `foo` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:4),OpColon(1:5-1:6),UpperIdent(1:7-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/type_signature_function_def.md b/src/snapshots/old_syntax/type_signature_function_def.md
index db84443b52..02d4e85e04 100644
--- a/src/snapshots/old_syntax/type_signature_function_def.md
+++ b/src/snapshots/old_syntax/type_signature_function_def.md
@@ -11,9 +11,12 @@ foo = \x, _ -> 42
 42
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - type_signature_function_def.md:1:1:1:4
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `foo` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:4),OpColon(1:5-1:6),UpperIdent(1:7-1:10),Comma(1:10-1:11),UpperIdent(1:12-1:17),OpArrow(1:18-1:20),UpperIdent(1:21-1:25),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/type_tuple_where_annotation.md b/src/snapshots/old_syntax/type_tuple_where_annotation.md
index 2748ad5b14..50c3314dec 100644
--- a/src/snapshots/old_syntax/type_tuple_where_annotation.md
+++ b/src/snapshots/old_syntax/type_tuple_where_annotation.md
@@ -10,9 +10,12 @@ nextWhileLess = \buckets, key, shifts -> foo
 nextWhileLess
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - type_tuple_where_annotation.md:1:1:1:14
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `nextWhileLess` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:14),OpColon(1:15-1:16),UpperIdent(1:17-1:21),UpperIdent(1:22-1:28),Comma(1:28-1:29),LowerIdent(1:30-1:31),Comma(1:31-1:32),UpperIdent(1:33-1:35),OpArrow(1:36-1:38),OpenRound(1:39-1:40),UpperIdent(1:40-1:43),Comma(1:43-1:44),UpperIdent(1:45-1:48),CloseRound(1:48-1:49),KwWhere(1:50-1:55),LowerIdent(1:56-1:57),KwImplements(1:58-1:68),UpperIdent(1:69-1:73),OpAmpersand(1:74-1:75),UpperIdent(1:76-1:78),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/unary_negation_arg.md b/src/snapshots/old_syntax/unary_negation_arg.md
index 3d44e1b6b8..4c929ad551 100644
--- a/src/snapshots/old_syntax/unary_negation_arg.md
+++ b/src/snapshots/old_syntax/unary_negation_arg.md
@@ -8,9 +8,12 @@ type=expr
 whee  12 -foo
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - unary_negation_arg.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `whee` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),Int(1:7-1:9),OpUnaryMinus(1:10-1:11),LowerIdent(1:11-1:14),EndOfFile(1:14-1:14),
diff --git a/src/snapshots/old_syntax/unfinished_closure_pattern_in_parens.md b/src/snapshots/old_syntax/unfinished_closure_pattern_in_parens.md
index e1bb424c0d..cbaf0f7e0a 100644
--- a/src/snapshots/old_syntax/unfinished_closure_pattern_in_parens.md
+++ b/src/snapshots/old_syntax/unfinished_closure_pattern_in_parens.md
@@ -9,9 +9,12 @@ x = \( a
 )
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - unfinished_closure_pattern_in_parens.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpAssign(1:3-1:4),OpBackslash(1:5-1:6),NoSpaceOpenRound(1:6-1:7),LowerIdent(1:8-1:9),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/unicode_not_hex.md b/src/snapshots/old_syntax/unicode_not_hex.md
index b23841649d..18be3fae18 100644
--- a/src/snapshots/old_syntax/unicode_not_hex.md
+++ b/src/snapshots/old_syntax/unicode_not_hex.md
@@ -8,7 +8,7 @@ type=expr
 "abc\u(zzzz)def"
 ~~~
 # EXPECTED
-InvalidUnicodeEscapeSequence - unicode_not_hex.md:1:8:1:8
+NIL
 # PROBLEMS
 **INVALID UNICODE ESCAPE SEQUENCE**
 This Unicode escape sequence is not valid.
diff --git a/src/snapshots/old_syntax/unicode_overflow_str.md b/src/snapshots/old_syntax/unicode_overflow_str.md
index 45cb261e11..d3131664ca 100644
--- a/src/snapshots/old_syntax/unicode_overflow_str.md
+++ b/src/snapshots/old_syntax/unicode_overflow_str.md
@@ -8,9 +8,12 @@ type=expr
 m"\u(FFFFFF)"s
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - unicode_overflow_str.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `m` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),StringStart(1:2-1:3),StringPart(1:3-1:13),StringEnd(1:13-1:14),LowerIdent(1:14-1:15),EndOfFile(1:15-1:15),
diff --git a/src/snapshots/old_syntax/value_def_confusion.md b/src/snapshots/old_syntax/value_def_confusion.md
index 21c66d2583..7561979de9 100644
--- a/src/snapshots/old_syntax/value_def_confusion.md
+++ b/src/snapshots/old_syntax/value_def_confusion.md
@@ -11,9 +11,12 @@ F
 abc
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - value_def_confusion.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `a` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:2-1:3),UpperIdent(1:3-1:4),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/var_else.md b/src/snapshots/old_syntax/var_else.md
index 1181bfbd04..5ca77903bc 100644
--- a/src/snapshots/old_syntax/var_else.md
+++ b/src/snapshots/old_syntax/var_else.md
@@ -8,9 +8,12 @@ type=expr
 elsewhere
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - var_else.md:1:1:1:10
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `elsewhere` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:10),EndOfFile(1:10-1:10),
diff --git a/src/snapshots/old_syntax/var_if.md b/src/snapshots/old_syntax/var_if.md
index dc398cb9c2..28241357dc 100644
--- a/src/snapshots/old_syntax/var_if.md
+++ b/src/snapshots/old_syntax/var_if.md
@@ -8,9 +8,12 @@ type=expr
 iffy
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - var_if.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `iffy` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),EndOfFile(1:5-1:5),
diff --git a/src/snapshots/old_syntax/var_is.md b/src/snapshots/old_syntax/var_is.md
index 11c34b751d..5d35eec595 100644
--- a/src/snapshots/old_syntax/var_is.md
+++ b/src/snapshots/old_syntax/var_is.md
@@ -8,9 +8,12 @@ type=expr
 isnt
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - var_is.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `isnt` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),EndOfFile(1:5-1:5),
diff --git a/src/snapshots/old_syntax/var_minus_two.md b/src/snapshots/old_syntax/var_minus_two.md
index fa8680617c..799b55c975 100644
--- a/src/snapshots/old_syntax/var_minus_two.md
+++ b/src/snapshots/old_syntax/var_minus_two.md
@@ -8,9 +8,12 @@ type=expr
 x-2
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - var_minus_two.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpBinaryMinus(1:2-1:3),Int(1:3-1:4),EndOfFile(1:4-1:4),
diff --git a/src/snapshots/old_syntax/var_then.md b/src/snapshots/old_syntax/var_then.md
index 5774500dc4..de8c709a7d 100644
--- a/src/snapshots/old_syntax/var_then.md
+++ b/src/snapshots/old_syntax/var_then.md
@@ -8,9 +8,12 @@ type=expr
 thenever
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - var_then.md:1:1:1:9
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `thenever` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:9),EndOfFile(1:9-1:9),
diff --git a/src/snapshots/old_syntax/var_when.md b/src/snapshots/old_syntax/var_when.md
index 8e94d620d0..88b02c32aa 100644
--- a/src/snapshots/old_syntax/var_when.md
+++ b/src/snapshots/old_syntax/var_when.md
@@ -8,9 +8,12 @@ type=expr
 whenever
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - var_when.md:1:1:1:9
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `whenever` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:9),EndOfFile(1:9-1:9),
diff --git a/src/snapshots/old_syntax/weird_escape.md b/src/snapshots/old_syntax/weird_escape.md
index c0ce1e120c..453857e84d 100644
--- a/src/snapshots/old_syntax/weird_escape.md
+++ b/src/snapshots/old_syntax/weird_escape.md
@@ -8,7 +8,7 @@ type=expr
 "abc\qdef"
 ~~~
 # EXPECTED
-InvalidEscapeSequence - weird_escape.md:1:6:1:6
+NIL
 # PROBLEMS
 **INVALID ESCAPE SEQUENCE**
 This escape sequence is not recognized.
diff --git a/src/snapshots/old_syntax/when_branch_comment_after_parens.md b/src/snapshots/old_syntax/when_branch_comment_after_parens.md
index b726f1bdc3..3da810d20b 100644
--- a/src/snapshots/old_syntax/when_branch_comment_after_parens.md
+++ b/src/snapshots/old_syntax/when_branch_comment_after_parens.md
@@ -10,9 +10,12 @@ O->(s
 )#
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - when_branch_comment_after_parens.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),LowerIdent(1:6-1:7),LowerIdent(1:8-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/when_comment_after_pattern.md b/src/snapshots/old_syntax/when_comment_after_pattern.md
index c786f1f813..f1ab7b8137 100644
--- a/src/snapshots/old_syntax/when_comment_after_pattern.md
+++ b/src/snapshots/old_syntax/when_comment_after_pattern.md
@@ -10,9 +10,12 @@ O#
  ->r
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - when_comment_after_pattern.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),LowerIdent(1:6-1:9),LowerIdent(1:10-1:12),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/when_comment_bbefore_if.md b/src/snapshots/old_syntax/when_comment_bbefore_if.md
index 50d3f55679..5fb437867e 100644
--- a/src/snapshots/old_syntax/when_comment_bbefore_if.md
+++ b/src/snapshots/old_syntax/when_comment_bbefore_if.md
@@ -10,9 +10,12 @@ is S#
  if S->e
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - when_comment_bbefore_if.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),Int(1:6-1:7),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/when_if_guard.md b/src/snapshots/old_syntax/when_if_guard.md
index fd6c613215..8e01a00715 100644
--- a/src/snapshots/old_syntax/when_if_guard.md
+++ b/src/snapshots/old_syntax/when_if_guard.md
@@ -16,9 +16,12 @@ when x is
         3
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - when_if_guard.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),LowerIdent(1:6-1:7),LowerIdent(1:8-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/when_in_assignment.md b/src/snapshots/old_syntax/when_in_assignment.md
index 541d92cc09..1360c74df9 100644
--- a/src/snapshots/old_syntax/when_in_assignment.md
+++ b/src/snapshots/old_syntax/when_in_assignment.md
@@ -10,9 +10,12 @@ x = when n is
 42
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - when_in_assignment.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpAssign(1:3-1:4),LowerIdent(1:5-1:9),LowerIdent(1:10-1:11),LowerIdent(1:12-1:14),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/when_in_binop_in_assign_with_sneaky_newline.md b/src/snapshots/old_syntax/when_in_binop_in_assign_with_sneaky_newline.md
index b8939f2b1e..8e012f7e27 100644
--- a/src/snapshots/old_syntax/when_in_binop_in_assign_with_sneaky_newline.md
+++ b/src/snapshots/old_syntax/when_in_binop_in_assign_with_sneaky_newline.md
@@ -11,9 +11,12 @@ is e->(i
 h
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - when_in_binop_in_assign_with_sneaky_newline.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `j` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpAssign(1:2-1:3),LowerIdent(1:3-1:4),OpPercent(1:4-1:5),LowerIdent(1:5-1:9),LowerIdent(1:10-1:11),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/when_in_binop_in_closure_in_when_guard_wow_fuzzer.md b/src/snapshots/old_syntax/when_in_binop_in_closure_in_when_guard_wow_fuzzer.md
index caf47a4943..aa1f59d620 100644
--- a/src/snapshots/old_syntax/when_in_binop_in_closure_in_when_guard_wow_fuzzer.md
+++ b/src/snapshots/old_syntax/when_in_binop_in_closure_in_when_guard_wow_fuzzer.md
@@ -12,9 +12,12 @@ is z->e
  z->m
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - when_in_binop_in_closure_in_when_guard_wow_fuzzer.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),LowerIdent(1:6-1:7),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/when_in_binops.md b/src/snapshots/old_syntax/when_in_binops.md
index 1294b53337..a9f398c0c4 100644
--- a/src/snapshots/old_syntax/when_in_binops.md
+++ b/src/snapshots/old_syntax/when_in_binops.md
@@ -10,11 +10,20 @@ di<s<when b
  zl
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - when_in_binops.md:1:1:1:3
-UNDEFINED VARIABLE - when_in_binops.md:1:4:1:5
-UNDEFINED VARIABLE - when_in_binops.md:1:6:1:10
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `di` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `s` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:3),OpLessThan(1:3-1:4),LowerIdent(1:4-1:5),OpLessThan(1:5-1:6),LowerIdent(1:6-1:10),LowerIdent(1:11-1:12),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/when_in_closure_in_when_guard_wtf.md b/src/snapshots/old_syntax/when_in_closure_in_when_guard_wtf.md
index 19e22295f7..c44281695f 100644
--- a/src/snapshots/old_syntax/when_in_closure_in_when_guard_wtf.md
+++ b/src/snapshots/old_syntax/when_in_closure_in_when_guard_wtf.md
@@ -12,9 +12,12 @@ is z->f
  z->m
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - when_in_closure_in_when_guard_wtf.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),LowerIdent(1:6-1:7),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/when_in_function.md b/src/snapshots/old_syntax/when_in_function.md
index 36bc92a47a..44b4217db0 100644
--- a/src/snapshots/old_syntax/when_in_function.md
+++ b/src/snapshots/old_syntax/when_in_function.md
@@ -10,9 +10,12 @@ func = \x -> when n is
 42
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - when_in_function.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `func` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),OpAssign(1:6-1:7),OpBackslash(1:8-1:9),LowerIdent(1:9-1:10),OpArrow(1:11-1:13),LowerIdent(1:14-1:18),LowerIdent(1:19-1:20),LowerIdent(1:21-1:23),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/when_in_function_python_style_indent.md b/src/snapshots/old_syntax/when_in_function_python_style_indent.md
index 847c4f10c1..3eba9df444 100644
--- a/src/snapshots/old_syntax/when_in_function_python_style_indent.md
+++ b/src/snapshots/old_syntax/when_in_function_python_style_indent.md
@@ -10,9 +10,12 @@ func = \x -> when n is
 42
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - when_in_function_python_style_indent.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `func` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),OpAssign(1:6-1:7),OpBackslash(1:8-1:9),LowerIdent(1:9-1:10),OpArrow(1:11-1:13),LowerIdent(1:14-1:18),LowerIdent(1:19-1:20),LowerIdent(1:21-1:23),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/when_in_list.md b/src/snapshots/old_syntax/when_in_list.md
index 6d4243dc79..25b66b727f 100644
--- a/src/snapshots/old_syntax/when_in_list.md
+++ b/src/snapshots/old_syntax/when_in_list.md
@@ -9,7 +9,7 @@ type=expr
 ]]
 ~~~
 # EXPECTED
-expected_expr_close_square_or_comma - when_in_list.md:2:1:2:3
+LIST NOT CLOSED - when_in_list.md:2:1:2:3
 # PROBLEMS
 **LIST NOT CLOSED**
 This list is missing a closing bracket or has a syntax error.
diff --git a/src/snapshots/old_syntax/when_in_parens.md b/src/snapshots/old_syntax/when_in_parens.md
index f6dda00403..ed7507f456 100644
--- a/src/snapshots/old_syntax/when_in_parens.md
+++ b/src/snapshots/old_syntax/when_in_parens.md
@@ -10,7 +10,7 @@ type=expr
         3)
 ~~~
 # EXPECTED
-expected_expr_close_round_or_comma - when_in_parens.md:3:10:3:11
+PARSE ERROR - when_in_parens.md:3:10:3:11
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `expected_expr_close_round_or_comma`
diff --git a/src/snapshots/old_syntax/when_in_parens_indented.md b/src/snapshots/old_syntax/when_in_parens_indented.md
index 89ec969cd3..1915135fcd 100644
--- a/src/snapshots/old_syntax/when_in_parens_indented.md
+++ b/src/snapshots/old_syntax/when_in_parens_indented.md
@@ -10,7 +10,7 @@ type=expr
      )
 ~~~
 # EXPECTED
-expected_expr_close_round_or_comma - when_in_parens_indented.md:3:6:3:7
+PARSE ERROR - when_in_parens_indented.md:3:6:3:7
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `expected_expr_close_round_or_comma`
diff --git a/src/snapshots/old_syntax/when_in_when_guard_wtf.md b/src/snapshots/old_syntax/when_in_when_guard_wtf.md
index 04995680f9..768011842a 100644
--- a/src/snapshots/old_syntax/when_in_when_guard_wtf.md
+++ b/src/snapshots/old_syntax/when_in_when_guard_wtf.md
@@ -12,9 +12,12 @@ is z->f
  z->m
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - when_in_when_guard_wtf.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),LowerIdent(1:6-1:7),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/when_missing_arrow.md b/src/snapshots/old_syntax/when_missing_arrow.md
index 6762426ab3..d9b555ffe5 100644
--- a/src/snapshots/old_syntax/when_missing_arrow.md
+++ b/src/snapshots/old_syntax/when_missing_arrow.md
@@ -10,9 +10,12 @@ when 5 is
     _
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - when_missing_arrow.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),Int(1:6-1:7),LowerIdent(1:8-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/when_newline_after_condition.md b/src/snapshots/old_syntax/when_newline_after_condition.md
index cea3acc75c..cb93498221 100644
--- a/src/snapshots/old_syntax/when_newline_after_condition.md
+++ b/src/snapshots/old_syntax/when_newline_after_condition.md
@@ -10,9 +10,12 @@ when n
 is O->1
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - when_newline_after_condition.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),LowerIdent(1:6-1:7),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/when_newline_before_is_and_in_branch_parens.md b/src/snapshots/old_syntax/when_newline_before_is_and_in_branch_parens.md
index b18f2aef2e..895877e74f 100644
--- a/src/snapshots/old_syntax/when_newline_before_is_and_in_branch_parens.md
+++ b/src/snapshots/old_syntax/when_newline_before_is_and_in_branch_parens.md
@@ -10,9 +10,12 @@ is B->(
 t)
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - when_newline_before_is_and_in_branch_parens.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),Int(1:6-1:7),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/when_outdented_branch.md b/src/snapshots/old_syntax/when_outdented_branch.md
index 8cc0cf09cf..f9b42f37ac 100644
--- a/src/snapshots/old_syntax/when_outdented_branch.md
+++ b/src/snapshots/old_syntax/when_outdented_branch.md
@@ -10,9 +10,12 @@ when 4 is
  2 -> 2
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - when_outdented_branch.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),Int(1:6-1:7),LowerIdent(1:8-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/when_over_indented_int.md b/src/snapshots/old_syntax/when_over_indented_int.md
index e9140d8e73..5ce29492d2 100644
--- a/src/snapshots/old_syntax/when_over_indented_int.md
+++ b/src/snapshots/old_syntax/when_over_indented_int.md
@@ -10,9 +10,12 @@ when 4 is
      2 -> 2
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - when_over_indented_int.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),Int(1:6-1:7),LowerIdent(1:8-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/when_over_indented_underscore.md b/src/snapshots/old_syntax/when_over_indented_underscore.md
index e72a9eb6ce..770565f5da 100644
--- a/src/snapshots/old_syntax/when_over_indented_underscore.md
+++ b/src/snapshots/old_syntax/when_over_indented_underscore.md
@@ -10,9 +10,12 @@ when 4 is
      _ -> 2
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - when_over_indented_underscore.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),Int(1:6-1:7),LowerIdent(1:8-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/when_result_list.md b/src/snapshots/old_syntax/when_result_list.md
index 5c77cd2af6..3f4e98cb59 100644
--- a/src/snapshots/old_syntax/when_result_list.md
+++ b/src/snapshots/old_syntax/when_result_list.md
@@ -10,9 +10,12 @@ when Ok [] is
     _ -> {}
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - when_result_list.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),UpperIdent(1:6-1:8),OpenSquare(1:9-1:10),CloseSquare(1:10-1:11),LowerIdent(1:12-1:14),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/when_with_alternative_patterns.md b/src/snapshots/old_syntax/when_with_alternative_patterns.md
index a5e8d67896..8420d84f82 100644
--- a/src/snapshots/old_syntax/when_with_alternative_patterns.md
+++ b/src/snapshots/old_syntax/when_with_alternative_patterns.md
@@ -13,9 +13,12 @@ when x is
  "stuff" -> 4
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - when_with_alternative_patterns.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),LowerIdent(1:6-1:7),LowerIdent(1:8-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/when_with_function_application.md b/src/snapshots/old_syntax/when_with_function_application.md
index 10ae590553..c1cb7974dd 100644
--- a/src/snapshots/old_syntax/when_with_function_application.md
+++ b/src/snapshots/old_syntax/when_with_function_application.md
@@ -11,9 +11,12 @@ when x is
     _ -> 4
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - when_with_function_application.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),LowerIdent(1:6-1:7),LowerIdent(1:8-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/when_with_negative_numbers.md b/src/snapshots/old_syntax/when_with_negative_numbers.md
index 771065bd59..f37a436dca 100644
--- a/src/snapshots/old_syntax/when_with_negative_numbers.md
+++ b/src/snapshots/old_syntax/when_with_negative_numbers.md
@@ -10,9 +10,12 @@ when x is
  -3 -> 4
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - when_with_negative_numbers.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),LowerIdent(1:6-1:7),LowerIdent(1:8-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/when_with_numbers.md b/src/snapshots/old_syntax/when_with_numbers.md
index b4d90bb6ca..9f2c47d663 100644
--- a/src/snapshots/old_syntax/when_with_numbers.md
+++ b/src/snapshots/old_syntax/when_with_numbers.md
@@ -10,9 +10,12 @@ when x is
  3 -> 4
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - when_with_numbers.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),LowerIdent(1:6-1:7),LowerIdent(1:8-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/when_with_records.md b/src/snapshots/old_syntax/when_with_records.md
index 4c49f2a643..9dd729a688 100644
--- a/src/snapshots/old_syntax/when_with_records.md
+++ b/src/snapshots/old_syntax/when_with_records.md
@@ -10,9 +10,12 @@ when x is
  { z, w } -> 4
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - when_with_records.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),LowerIdent(1:6-1:7),LowerIdent(1:8-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/when_with_tuple_in_record.md b/src/snapshots/old_syntax/when_with_tuple_in_record.md
index c0538a4323..b1551d7204 100644
--- a/src/snapshots/old_syntax/when_with_tuple_in_record.md
+++ b/src/snapshots/old_syntax/when_with_tuple_in_record.md
@@ -10,9 +10,12 @@ when {foo: (1, 2)} is
  {foo: (_, b)} -> 3 + b
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - when_with_tuple_in_record.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),OpenCurly(1:6-1:7),LowerIdent(1:7-1:10),OpColon(1:10-1:11),OpenRound(1:12-1:13),Int(1:13-1:14),Comma(1:14-1:15),Int(1:16-1:17),CloseRound(1:17-1:18),CloseCurly(1:18-1:19),LowerIdent(1:20-1:22),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/when_with_tuples.md b/src/snapshots/old_syntax/when_with_tuples.md
index 2c73b79551..1b2c9aa83b 100644
--- a/src/snapshots/old_syntax/when_with_tuples.md
+++ b/src/snapshots/old_syntax/when_with_tuples.md
@@ -10,9 +10,12 @@ when (1, 2) is
  (_, b) -> 3 + b
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - when_with_tuples.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `when` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),OpenRound(1:6-1:7),Int(1:7-1:8),Comma(1:8-1:9),Int(1:10-1:11),CloseRound(1:11-1:12),LowerIdent(1:13-1:15),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/where_and_implements_lookalikes.md b/src/snapshots/old_syntax/where_and_implements_lookalikes.md
index 49b1d17f85..621b1e3128 100644
--- a/src/snapshots/old_syntax/where_and_implements_lookalikes.md
+++ b/src/snapshots/old_syntax/where_and_implements_lookalikes.md
@@ -10,7 +10,7 @@ type=expr
 e)
 ~~~
 # EXPECTED
-expected_expr_close_round_or_comma - where_and_implements_lookalikes.md:3:2:3:3
+PARSE ERROR - where_and_implements_lookalikes.md:3:2:3:3
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `expected_expr_close_round_or_comma`
diff --git a/src/snapshots/old_syntax/where_clause_function.md b/src/snapshots/old_syntax/where_clause_function.md
index 4fd48b02e1..5f63cfc100 100644
--- a/src/snapshots/old_syntax/where_clause_function.md
+++ b/src/snapshots/old_syntax/where_clause_function.md
@@ -10,9 +10,12 @@ f : a -> (b -> c) where a implements A
 f
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - where_clause_function.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),LowerIdent(1:5-1:6),OpArrow(1:7-1:9),OpenRound(1:10-1:11),LowerIdent(1:11-1:12),OpArrow(1:13-1:15),LowerIdent(1:16-1:17),CloseRound(1:17-1:18),KwWhere(1:19-1:24),LowerIdent(1:25-1:26),KwImplements(1:27-1:37),UpperIdent(1:38-1:39),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/where_clause_multiple_bound_abilities.md b/src/snapshots/old_syntax/where_clause_multiple_bound_abilities.md
index a19d4c128e..8a9060871e 100644
--- a/src/snapshots/old_syntax/where_clause_multiple_bound_abilities.md
+++ b/src/snapshots/old_syntax/where_clause_multiple_bound_abilities.md
@@ -14,9 +14,12 @@ f : a -> b
 f
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - where_clause_multiple_bound_abilities.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),LowerIdent(1:5-1:6),OpArrow(1:7-1:9),LowerIdent(1:10-1:11),KwWhere(1:12-1:17),LowerIdent(1:18-1:19),KwImplements(1:20-1:30),UpperIdent(1:31-1:35),OpAmpersand(1:36-1:37),UpperIdent(1:38-1:40),Comma(1:40-1:41),LowerIdent(1:42-1:43),KwImplements(1:44-1:54),UpperIdent(1:55-1:57),OpAmpersand(1:58-1:59),UpperIdent(1:60-1:64),OpAmpersand(1:65-1:66),UpperIdent(1:67-1:74),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/where_clause_multiple_has.md b/src/snapshots/old_syntax/where_clause_multiple_has.md
index 6341c9060a..60bf103155 100644
--- a/src/snapshots/old_syntax/where_clause_multiple_has.md
+++ b/src/snapshots/old_syntax/where_clause_multiple_has.md
@@ -10,9 +10,12 @@ f : a -> (b -> c) where a implements A, b implements Eq, c implements Ord
 f
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - where_clause_multiple_has.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),LowerIdent(1:5-1:6),OpArrow(1:7-1:9),OpenRound(1:10-1:11),LowerIdent(1:11-1:12),OpArrow(1:13-1:15),LowerIdent(1:16-1:17),CloseRound(1:17-1:18),KwWhere(1:19-1:24),LowerIdent(1:25-1:26),KwImplements(1:27-1:37),UpperIdent(1:38-1:39),Comma(1:39-1:40),LowerIdent(1:41-1:42),KwImplements(1:43-1:53),UpperIdent(1:54-1:56),Comma(1:56-1:57),LowerIdent(1:58-1:59),KwImplements(1:60-1:70),UpperIdent(1:71-1:74),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/where_clause_multiple_has_across_newlines.md b/src/snapshots/old_syntax/where_clause_multiple_has_across_newlines.md
index 10c4d75c17..dbf804e7ab 100644
--- a/src/snapshots/old_syntax/where_clause_multiple_has_across_newlines.md
+++ b/src/snapshots/old_syntax/where_clause_multiple_has_across_newlines.md
@@ -13,9 +13,12 @@ f : a -> (b -> c)
 f
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - where_clause_multiple_has_across_newlines.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),LowerIdent(1:5-1:6),OpArrow(1:7-1:9),OpenRound(1:10-1:11),LowerIdent(1:11-1:12),OpArrow(1:13-1:15),LowerIdent(1:16-1:17),CloseRound(1:17-1:18),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/where_clause_non_function.md b/src/snapshots/old_syntax/where_clause_non_function.md
index 4c793313ae..5dab0f9854 100644
--- a/src/snapshots/old_syntax/where_clause_non_function.md
+++ b/src/snapshots/old_syntax/where_clause_non_function.md
@@ -10,9 +10,12 @@ f : a where a implements A
 f
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - where_clause_non_function.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),LowerIdent(1:5-1:6),KwWhere(1:7-1:12),LowerIdent(1:13-1:14),KwImplements(1:15-1:25),UpperIdent(1:26-1:27),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/where_clause_on_newline.md b/src/snapshots/old_syntax/where_clause_on_newline.md
index ebbb64e4c9..23d0c419a7 100644
--- a/src/snapshots/old_syntax/where_clause_on_newline.md
+++ b/src/snapshots/old_syntax/where_clause_on_newline.md
@@ -11,9 +11,12 @@ f : a -> U64
 f
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - where_clause_on_newline.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `f` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:3-1:4),LowerIdent(1:5-1:6),OpArrow(1:7-1:9),UpperIdent(1:10-1:13),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/where_type_variable.md b/src/snapshots/old_syntax/where_type_variable.md
index 5abf311fa4..da74d69ef8 100644
--- a/src/snapshots/old_syntax/where_type_variable.md
+++ b/src/snapshots/old_syntax/where_type_variable.md
@@ -11,9 +11,12 @@ role = Admin
 role
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - where_type_variable.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `role` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),OpColon(1:6-1:7),UpperIdent(1:8-1:12),KwWhere(1:13-1:18),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/wherem_implementsf.md b/src/snapshots/old_syntax/wherem_implementsf.md
index 43fc07de39..27f382ee4d 100644
--- a/src/snapshots/old_syntax/wherem_implementsf.md
+++ b/src/snapshots/old_syntax/wherem_implementsf.md
@@ -11,9 +11,12 @@ implementsF)A
 _
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - wherem_implementsf.md:1:1:1:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `s` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:2),OpColon(1:2-1:3),NoSpaceOpenRound(1:3-1:4),LowerIdent(1:4-1:5),Newline(1:1-1:1),
diff --git a/src/snapshots/old_syntax/wild_case_arrow.md b/src/snapshots/old_syntax/wild_case_arrow.md
index 617c1e4f5f..bf1d1f5f71 100644
--- a/src/snapshots/old_syntax/wild_case_arrow.md
+++ b/src/snapshots/old_syntax/wild_case_arrow.md
@@ -8,9 +8,12 @@ type=expr
 main = 5 -> 3
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - wild_case_arrow.md:1:1:1:5
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `main` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:5),OpAssign(1:6-1:7),Int(1:8-1:9),OpArrow(1:10-1:12),Int(1:13-1:14),EndOfFile(1:14-1:14),
diff --git a/src/snapshots/pattern_f64_overflow.md b/src/snapshots/pattern_f64_overflow.md
index 89dcb979d8..5509cc7f4f 100644
--- a/src/snapshots/pattern_f64_overflow.md
+++ b/src/snapshots/pattern_f64_overflow.md
@@ -14,10 +14,69 @@ match x {
 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - pattern_f64_overflow.md:1:7:1:8
-UNUSED VARIABLE - pattern_f64_overflow.md:6:5:6:10
+UNDEFINED VARIABLE - pattern_f64_overflow.md:6:5:6:10
 # PROBLEMS
-NIL
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**F64 NOT ALLOWED IN PATTERN**
+This floating-point literal cannot be used in a pattern match: `1e100`
+
+This number exceeds the precision range of Roc's `Dec` type and would require F64 representation. Floating-point numbers (F64) cannot be used in patterns because they don't have reliable equality comparison.
+
+Consider one of these alternatives:
+• Use a guard condition with a range check
+• Use a smaller number that fits in Dec's precision
+• Restructure your code to avoid pattern matching on this value
+
+For example, instead of:
+`1e100 => ...`
+Use a guard:
+`n if n > 1e99 => ...`
+
+**F64 NOT ALLOWED IN PATTERN**
+This floating-point literal cannot be used in a pattern match: `1e-40`
+
+This number exceeds the precision range of Roc's `Dec` type and would require F64 representation. Floating-point numbers (F64) cannot be used in patterns because they don't have reliable equality comparison.
+
+Consider one of these alternatives:
+• Use a guard condition with a range check
+• Use a smaller number that fits in Dec's precision
+• Restructure your code to avoid pattern matching on this value
+
+For example, instead of:
+`1e100 => ...`
+Use a guard:
+`n if n > 1e99 => ...`
+
+**F64 NOT ALLOWED IN PATTERN**
+This floating-point literal cannot be used in a pattern match: `1.7976931348623157e308`
+
+This number exceeds the precision range of Roc's `Dec` type and would require F64 representation. Floating-point numbers (F64) cannot be used in patterns because they don't have reliable equality comparison.
+
+Consider one of these alternatives:
+• Use a guard condition with a range check
+• Use a smaller number that fits in Dec's precision
+• Restructure your code to avoid pattern matching on this value
+
+For example, instead of:
+`1e100 => ...`
+Use a guard:
+`n if n > 1e99 => ...`
+
+**UNUSED VARIABLE**
+Variable ``value`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_value` to suppress this warning.
+The unused variable is declared here:
+**pattern_f64_overflow.md:6:5:6:10:**
+```roc
+    value => "other"
+```
+    ^^^^^
+
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:8),OpenCurly(1:9-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/plume_package/Color.md b/src/snapshots/plume_package/Color.md
index eb6b66ec46..124a037342 100644
--- a/src/snapshots/plume_package/Color.md
+++ b/src/snapshots/plume_package/Color.md
@@ -5,6 +5,24 @@ type=package
 ~~~
 # SOURCE
 ~~~roc
+# EXPECTED
+UNEXPECTED TOKEN IN PATTERN - Color.md:33:10:33:14
+PARSE ERROR - Color.md:63:9:63:12
+UNEXPECTED TOKEN IN EXPRESSION - Color.md:64:5:64:5
+PARSE ERROR - Color.md:65:13:65:26
+PARSE ERROR - Color.md:65:9:65:13
+PARSE ERROR - Color.md:65:9:65:13
+UNEXPECTED TOKEN IN EXPRESSION - Color.md:65:27:65:43
+UNEXPECTED TOKEN IN EXPRESSION - Color.md:65:41:65:46
+UNEXPECTED TOKEN IN EXPRESSION - Color.md:65:46:65:47
+UNEXPECTED TOKEN IN EXPRESSION - Color.md:65:47:65:48
+UNEXPECTED TOKEN IN EXPRESSION - Color.md:65:47:65:49
+UNEXPECTED TOKEN IN EXPRESSION - Color.md:65:48:65:50
+UNEXPECTED TOKEN IN EXPRESSION - Color.md:65:49:65:49
+INVALID PATTERN - Color.md:30:5:30:25
+NOT IMPLEMENTED - Color.md:61:10:61:13
+UNDEFINED VARIABLE - Color.md:21:1:21:5
+TYPE MISMATCH - Color.md:27:1:27:4
 module [
     Color,
     to_str,
diff --git a/src/snapshots/plume_package/main.md b/src/snapshots/plume_package/main.md
index 0279344421..c04d1b17cf 100644
--- a/src/snapshots/plume_package/main.md
+++ b/src/snapshots/plume_package/main.md
@@ -5,6 +5,8 @@ type=package
 ~~~
 # SOURCE
 ~~~roc
+# EXPECTED
+NIL
 package [
     Color,
 ] {}
diff --git a/src/snapshots/primitive/stmt_import.md b/src/snapshots/primitive/stmt_import.md
index d54d397d97..8b2f049458 100644
--- a/src/snapshots/primitive/stmt_import.md
+++ b/src/snapshots/primitive/stmt_import.md
@@ -12,7 +12,10 @@ import json.Json [foo, BAR]
 # EXPECTED
 NIL
 # PROBLEMS
-NIL
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 # TOKENS
 ~~~zig
 KwModule(1:1-1:7),OpenSquare(1:8-1:9),CloseSquare(1:9-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/qualified_type_canonicalization.md b/src/snapshots/qualified_type_canonicalization.md
index 8ad90775d8..bcd8175300 100644
--- a/src/snapshots/qualified_type_canonicalization.md
+++ b/src/snapshots/qualified_type_canonicalization.md
@@ -50,25 +50,25 @@ transform = \result ->
         Result.Err err -> TypeC.default
 ~~~
 # EXPECTED
-import_exposing_no_close - qualified_type_canonicalization.md:8:1:8:14
+PARSE ERROR - qualified_type_canonicalization.md:8:1:8:14
+PARSE ERROR - qualified_type_canonicalization.md:8:14:8:14
 UNEXPECTED TOKEN IN EXPRESSION - qualified_type_canonicalization.md:10:15:10:32
 UNEXPECTED TOKEN IN EXPRESSION - qualified_type_canonicalization.md:10:24:10:34
+PARSE ERROR - qualified_type_canonicalization.md:26:32:26:32
 UNEXPECTED TOKEN IN EXPRESSION - qualified_type_canonicalization.md:31:12:31:14
 UNEXPECTED TOKEN IN EXPRESSION - qualified_type_canonicalization.md:31:24:31:30
 UNEXPECTED TOKEN IN EXPRESSION - qualified_type_canonicalization.md:35:16:35:22
-expr_arrow_expects_ident - qualified_type_canonicalization.md:36:5:36:21
+PARSE ERROR - qualified_type_canonicalization.md:36:5:36:21
 UNEXPECTED TOKEN IN EXPRESSION - qualified_type_canonicalization.md:36:6:36:22
-expected_colon_after_type_annotation - qualified_type_canonicalization.md:39:32:39:43
-expected_colon_after_type_annotation - qualified_type_canonicalization.md:39:43:39:52
+UNEXPECTED TOKEN IN EXPRESSION - qualified_type_canonicalization.md:36:21:36:21
+PARSE ERROR - qualified_type_canonicalization.md:39:32:39:43
+PARSE ERROR - qualified_type_canonicalization.md:39:43:39:52
 UNEXPECTED TOKEN IN EXPRESSION - qualified_type_canonicalization.md:39:50:39:60
-expected_colon_after_type_annotation - qualified_type_canonicalization.md:39:60:39:74
+PARSE ERROR - qualified_type_canonicalization.md:39:60:39:74
+UNEXPECTED TOKEN IN EXPRESSION - qualified_type_canonicalization.md:39:68:39:68
 UNEXPECTED TOKEN IN EXPRESSION - qualified_type_canonicalization.md:40:13:40:20
-expected_colon_after_type_annotation - qualified_type_canonicalization.md:42:15:42:22
-expected_colon_after_type_annotation - qualified_type_canonicalization.md:43:15:43:23
-UNDEFINED VARIABLE - qualified_type_canonicalization.md:23:23:23:32
-expr_not_canonicalized - qualified_type_canonicalization.md:31:12:31:14
-expr_not_canonicalized - qualified_type_canonicalization.md:35:16:35:22
-expr_not_canonicalized - qualified_type_canonicalization.md:40:13:40:20
+PARSE ERROR - qualified_type_canonicalization.md:42:15:42:22
+PARSE ERROR - qualified_type_canonicalization.md:43:15:43:23
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `import_exposing_no_close`
@@ -382,6 +382,98 @@ Here is the problematic code:
               ^^^^^^^^
 
 
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**UNDEFINED VARIABLE**
+Nothing is named `new` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 # TOKENS
 ~~~zig
 KwModule(1:1-1:7),OpenSquare(1:8-1:9),Newline(1:1-1:1),
diff --git a/src/snapshots/record_access_multiline_formatting_1.md b/src/snapshots/record_access_multiline_formatting_1.md
index 17ed2e4c90..ed217b891d 100644
--- a/src/snapshots/record_access_multiline_formatting_1.md
+++ b/src/snapshots/record_access_multiline_formatting_1.md
@@ -11,9 +11,12 @@ some_fn(arg1)?
 	.record_field?
 ~~~
 # EXPECTED
-not_implemented - record_access_multiline_formatting_1.md:1:1:1:1
-# PROBLEMS
 NIL
+# PROBLEMS
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize suffix_single_question expression
+Let us know if you want to help!
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:8),NoSpaceOpenRound(1:8-1:9),LowerIdent(1:9-1:13),CloseRound(1:13-1:14),NoSpaceOpQuestion(1:14-1:15),Newline(1:1-1:1),
diff --git a/src/snapshots/record_access_multiline_formatting_4.md b/src/snapshots/record_access_multiline_formatting_4.md
index 48c6c5d366..a25aa9e21b 100644
--- a/src/snapshots/record_access_multiline_formatting_4.md
+++ b/src/snapshots/record_access_multiline_formatting_4.md
@@ -11,9 +11,12 @@ some_fn(arg1)? # Comment 1
 	.record_field?
 ~~~
 # EXPECTED
-not_implemented - record_access_multiline_formatting_4.md:1:1:1:1
-# PROBLEMS
 NIL
+# PROBLEMS
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize suffix_single_question expression
+Let us know if you want to help!
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:8),NoSpaceOpenRound(1:8-1:9),LowerIdent(1:9-1:13),CloseRound(1:13-1:14),NoSpaceOpQuestion(1:14-1:15),Newline(1:17-1:27),
diff --git a/src/snapshots/records/error_duplicate_fields.md b/src/snapshots/records/error_duplicate_fields.md
index 6e5d5cd9e9..49c8675383 100644
--- a/src/snapshots/records/error_duplicate_fields.md
+++ b/src/snapshots/records/error_duplicate_fields.md
@@ -8,9 +8,47 @@ type=expr
 { name: "Alice", age: 30, name: "Bob", email: "alice@example.com", age: 25 }
 ~~~
 # EXPECTED
-NIL
+DUPLICATE RECORD FIELD - error_duplicate_fields.md:1:27:1:31
+error_duplicate_fields.md:1:3:1:7: - error_duplicate_fields.md:1:68:1:71
 # PROBLEMS
-NIL
+**DUPLICATE RECORD FIELD**
+The record field ``name`` appears more than once in this record.
+
+This field is duplicated here:
+**error_duplicate_fields.md:1:27:1:31:**
+```roc
+{ name: "Alice", age: 30, name: "Bob", email: "alice@example.com", age: 25 }
+```
+                          ^^^^
+
+The field ``name`` was first defined here:
+**error_duplicate_fields.md:1:3:1:7:**
+```roc
+{ name: "Alice", age: 30, name: "Bob", email: "alice@example.com", age: 25 }
+```
+  ^^^^
+
+Record fields must have unique names. Consider renaming one of these fields or removing the duplicate.
+
+**DUPLICATE RECORD FIELD**
+The record field ``age`` appears more than once in this record.
+
+This field is duplicated here:
+**error_duplicate_fields.md:1:68:1:71:**
+```roc
+{ name: "Alice", age: 30, name: "Bob", email: "alice@example.com", age: 25 }
+```
+                                                                   ^^^
+
+The field ``age`` was first defined here:
+**error_duplicate_fields.md:1:18:1:21:**
+```roc
+{ name: "Alice", age: 30, name: "Bob", email: "alice@example.com", age: 25 }
+```
+                 ^^^
+
+Record fields must have unique names. Consider renaming one of these fields or removing the duplicate.
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),LowerIdent(1:3-1:7),OpColon(1:7-1:8),StringStart(1:9-1:10),StringPart(1:10-1:15),StringEnd(1:15-1:16),Comma(1:16-1:17),LowerIdent(1:18-1:21),OpColon(1:21-1:22),Int(1:23-1:25),Comma(1:25-1:26),LowerIdent(1:27-1:31),OpColon(1:31-1:32),StringStart(1:33-1:34),StringPart(1:34-1:37),StringEnd(1:37-1:38),Comma(1:38-1:39),LowerIdent(1:40-1:45),OpColon(1:45-1:46),StringStart(1:47-1:48),StringPart(1:48-1:65),StringEnd(1:65-1:66),Comma(1:66-1:67),LowerIdent(1:68-1:71),OpColon(1:71-1:72),Int(1:73-1:75),CloseCurly(1:76-1:77),EndOfFile(1:77-1:77),
diff --git a/src/snapshots/records/error_malformed_syntax.md b/src/snapshots/records/error_malformed_syntax.md
index 6aa25d7a5d..d61b92553b 100644
--- a/src/snapshots/records/error_malformed_syntax.md
+++ b/src/snapshots/records/error_malformed_syntax.md
@@ -8,8 +8,8 @@ type=expr
 { name: "Alice", : 30, , email: , active Bool.true, "invalid": value, 42: "number key", : }
 ~~~
 # EXPECTED
-expected_expr_record_field_name - error_malformed_syntax.md:1:18:1:22
-expected_expr_close_curly_or_comma - error_malformed_syntax.md:1:20:1:23
+PARSE ERROR - error_malformed_syntax.md:1:18:1:22
+PARSE ERROR - error_malformed_syntax.md:1:20:1:23
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `expected_expr_record_field_name`
diff --git a/src/snapshots/records/error_malformed_syntax_2.md b/src/snapshots/records/error_malformed_syntax_2.md
index b4b96b4563..9a741b9232 100644
--- a/src/snapshots/records/error_malformed_syntax_2.md
+++ b/src/snapshots/records/error_malformed_syntax_2.md
@@ -8,7 +8,7 @@ type=expr
 { age: 42, name = "Alice" }
 ~~~
 # EXPECTED
-expected_expr_close_curly_or_comma - error_malformed_syntax_2.md:1:17:1:20
+PARSE ERROR - error_malformed_syntax_2.md:1:17:1:20
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `expected_expr_close_curly_or_comma`
diff --git a/src/snapshots/records/function_record_parameter_capture.md b/src/snapshots/records/function_record_parameter_capture.md
index 2564d125bf..33700a35bd 100644
--- a/src/snapshots/records/function_record_parameter_capture.md
+++ b/src/snapshots/records/function_record_parameter_capture.md
@@ -8,12 +8,24 @@ type=expr
 |{ name, age, ..a } as person| { greeting: "Hello ${name}", full_record: person, is_adult: age >= 18 }
 ~~~
 # EXPECTED
-not_implemented - function_record_parameter_capture.md:1:1:1:1
-UNDEFINED VARIABLE - function_record_parameter_capture.md:1:53:1:57
-UNDEFINED VARIABLE - function_record_parameter_capture.md:1:74:1:80
-UNDEFINED VARIABLE - function_record_parameter_capture.md:1:92:1:95
-# PROBLEMS
 NIL
+# PROBLEMS
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize alternatives pattern
+Let us know if you want to help!
+
+**UNDEFINED VARIABLE**
+Nothing is named `name` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `person` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `age` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpBar(1:1-1:2),OpenCurly(1:2-1:3),LowerIdent(1:4-1:8),Comma(1:8-1:9),LowerIdent(1:10-1:13),Comma(1:13-1:14),DoubleDot(1:15-1:17),LowerIdent(1:17-1:18),CloseCurly(1:19-1:20),KwAs(1:21-1:23),LowerIdent(1:24-1:30),OpBar(1:30-1:31),OpenCurly(1:32-1:33),LowerIdent(1:34-1:42),OpColon(1:42-1:43),StringStart(1:44-1:45),StringPart(1:45-1:51),OpenStringInterpolation(1:51-1:53),LowerIdent(1:53-1:57),CloseStringInterpolation(1:57-1:58),StringPart(1:58-1:58),StringEnd(1:58-1:59),Comma(1:59-1:60),LowerIdent(1:61-1:72),OpColon(1:72-1:73),LowerIdent(1:74-1:80),Comma(1:80-1:81),LowerIdent(1:82-1:90),OpColon(1:90-1:91),LowerIdent(1:92-1:95),OpGreaterThanOrEq(1:96-1:98),Int(1:99-1:101),CloseCurly(1:102-1:103),EndOfFile(1:103-1:103),
diff --git a/src/snapshots/records/module_record_destructure.md b/src/snapshots/records/module_record_destructure.md
index 884b0f411f..6fe701c142 100644
--- a/src/snapshots/records/module_record_destructure.md
+++ b/src/snapshots/records/module_record_destructure.md
@@ -15,8 +15,6 @@ extract_age = |person| {
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - module_record_destructure.md:5:13:5:21
-UNDEFINED VARIABLE - module_record_destructure.md:5:7:5:10
-UNDEFINED VARIABLE - module_record_destructure.md:6:5:6:8
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **= person** is not expected in an expression.
@@ -30,6 +28,14 @@ Here is the problematic code:
             ^^^^^^^^
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `age` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `age` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 KwModule(1:1-1:7),OpenSquare(1:8-1:9),LowerIdent(1:9-1:20),CloseSquare(1:20-1:21),Newline(1:1-1:1),
diff --git a/src/snapshots/records/pattern_destructure_nested.md b/src/snapshots/records/pattern_destructure_nested.md
index 2f2c834fe6..4cec1251e5 100644
--- a/src/snapshots/records/pattern_destructure_nested.md
+++ b/src/snapshots/records/pattern_destructure_nested.md
@@ -10,12 +10,24 @@ match person {
 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - pattern_destructure_nested.md:1:7:1:13
-not_implemented - pattern_destructure_nested.md:2:13:2:49
-UNDEFINED VARIABLE - pattern_destructure_nested.md:2:73:2:79
-UNDEFINED VARIABLE - pattern_destructure_nested.md:2:86:2:90
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `person` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: record pattern with sub-patterns
+Let us know if you want to help!
+
+**UNDEFINED VARIABLE**
+Nothing is named `street` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `city` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:13),OpenCurly(1:14-1:15),Newline(1:1-1:1),
diff --git a/src/snapshots/records/pattern_destructure_rename.md b/src/snapshots/records/pattern_destructure_rename.md
index 754525bb65..27112774e7 100644
--- a/src/snapshots/records/pattern_destructure_rename.md
+++ b/src/snapshots/records/pattern_destructure_rename.md
@@ -10,12 +10,24 @@ match person {
 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - pattern_destructure_rename.md:1:7:1:13
-not_implemented - pattern_destructure_rename.md:2:7:2:22
-UNDEFINED VARIABLE - pattern_destructure_rename.md:2:49:2:57
-UNDEFINED VARIABLE - pattern_destructure_rename.md:2:64:2:71
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `person` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: record pattern with sub-patterns
+Let us know if you want to help!
+
+**UNDEFINED VARIABLE**
+Nothing is named `userName` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `userAge` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:13),OpenCurly(1:14-1:15),Newline(1:1-1:1),
diff --git a/src/snapshots/records/pattern_destructure_simple.md b/src/snapshots/records/pattern_destructure_simple.md
index 5d1304f2a7..3ee7cb982a 100644
--- a/src/snapshots/records/pattern_destructure_simple.md
+++ b/src/snapshots/records/pattern_destructure_simple.md
@@ -10,10 +10,24 @@ match person {
 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - pattern_destructure_simple.md:1:7:1:13
-UNUSED VARIABLE - pattern_destructure_simple.md:2:13:2:18
+UNDEFINED VARIABLE - pattern_destructure_simple.md:2:13:2:18
 # PROBLEMS
-NIL
+**UNDEFINED VARIABLE**
+Nothing is named `person` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNUSED VARIABLE**
+Variable ``age`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_age` to suppress this warning.
+The unused variable is declared here:
+**pattern_destructure_simple.md:2:13:2:18:**
+```roc
+    { name, age } => name
+```
+            ^^^^^
+
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:13),OpenCurly(1:14-1:15),Newline(1:1-1:1),
diff --git a/src/snapshots/records/pattern_destructure_with_rest.md b/src/snapshots/records/pattern_destructure_with_rest.md
index a1c65542e1..e3654ed4ba 100644
--- a/src/snapshots/records/pattern_destructure_with_rest.md
+++ b/src/snapshots/records/pattern_destructure_with_rest.md
@@ -10,11 +10,20 @@ match person {
 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - pattern_destructure_with_rest.md:1:7:1:13
-UNDEFINED VARIABLE - pattern_destructure_with_rest.md:2:33:2:40
-UNDEFINED VARIABLE - pattern_destructure_with_rest.md:2:55:2:62
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `person` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `len` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `len` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 KwMatch(1:1-1:6),LowerIdent(1:7-1:13),OpenCurly(1:14-1:15),Newline(1:1-1:1),
diff --git a/src/snapshots/records/record_access_function_call.md b/src/snapshots/records/record_access_function_call.md
index 0d5d9203ff..77109f8cbb 100644
--- a/src/snapshots/records/record_access_function_call.md
+++ b/src/snapshots/records/record_access_function_call.md
@@ -8,9 +8,12 @@ type=expr
 (person.transform)(42)
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - record_access_function_call.md:1:2:1:8
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `person` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenRound(1:1-1:2),LowerIdent(1:2-1:8),NoSpaceDotLowerIdent(1:8-1:18),CloseRound(1:18-1:19),NoSpaceOpenRound(1:19-1:20),Int(1:20-1:22),CloseRound(1:22-1:23),EndOfFile(1:23-1:23),
diff --git a/src/snapshots/records/record_access_in_expression.md b/src/snapshots/records/record_access_in_expression.md
index d873ac0967..fc376ecfb2 100644
--- a/src/snapshots/records/record_access_in_expression.md
+++ b/src/snapshots/records/record_access_in_expression.md
@@ -8,9 +8,12 @@ type=expr
 person.age + 5
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - record_access_in_expression.md:1:1:1:7
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `person` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:7),NoSpaceDotLowerIdent(1:7-1:11),OpPlus(1:12-1:13),Int(1:14-1:15),EndOfFile(1:15-1:15),
diff --git a/src/snapshots/records/record_chained_access.md b/src/snapshots/records/record_chained_access.md
index 640baaea39..a3884126e7 100644
--- a/src/snapshots/records/record_chained_access.md
+++ b/src/snapshots/records/record_chained_access.md
@@ -8,9 +8,12 @@ type=expr
 person.address.street
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - record_chained_access.md:1:1:1:7
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `person` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:7),NoSpaceDotLowerIdent(1:7-1:15),NoSpaceDotLowerIdent(1:15-1:22),EndOfFile(1:22-1:22),
diff --git a/src/snapshots/records/record_different_fields_error.md b/src/snapshots/records/record_different_fields_error.md
index 57cc06b8e9..77713407d6 100644
--- a/src/snapshots/records/record_different_fields_error.md
+++ b/src/snapshots/records/record_different_fields_error.md
@@ -18,24 +18,23 @@ type=expr
 UNEXPECTED TOKEN IN TYPE ANNOTATION - record_different_fields_error.md:2:20:2:39
 UNEXPECTED TOKEN IN EXPRESSION - record_different_fields_error.md:2:21:2:40
 UNEXPECTED TOKEN IN EXPRESSION - record_different_fields_error.md:2:39:2:41
+UNEXPECTED TOKEN IN EXPRESSION - record_different_fields_error.md:2:40:2:40
 UNEXPECTED TOKEN IN TYPE ANNOTATION - record_different_fields_error.md:3:13:3:33
 UNEXPECTED TOKEN IN EXPRESSION - record_different_fields_error.md:3:14:3:34
 UNEXPECTED TOKEN IN EXPRESSION - record_different_fields_error.md:3:33:3:35
+UNEXPECTED TOKEN IN EXPRESSION - record_different_fields_error.md:3:34:3:34
 UNEXPECTED TOKEN IN EXPRESSION - record_different_fields_error.md:4:15:4:18
+UNEXPECTED TOKEN IN EXPRESSION - record_different_fields_error.md:4:25:4:25
 UNEXPECTED TOKEN IN EXPRESSION - record_different_fields_error.md:5:15:5:18
+UNEXPECTED TOKEN IN EXPRESSION - record_different_fields_error.md:5:24:5:24
 UNEXPECTED TOKEN IN EXPRESSION - record_different_fields_error.md:6:10:6:18
 UNEXPECTED TOKEN IN TYPE ANNOTATION - record_different_fields_error.md:6:20:6:27
 UNEXPECTED TOKEN IN EXPRESSION - record_different_fields_error.md:6:21:6:28
 UNEXPECTED TOKEN IN EXPRESSION - record_different_fields_error.md:6:27:6:29
+UNEXPECTED TOKEN IN EXPRESSION - record_different_fields_error.md:6:28:6:28
 UNEXPECTED TOKEN IN EXPRESSION - record_different_fields_error.md:7:10:7:18
 UNEXPECTED TOKEN IN EXPRESSION - record_different_fields_error.md:7:17:7:20
-MALFORMED TYPE - record_different_fields_error.md:2:20:2:39
-MALFORMED TYPE - record_different_fields_error.md:3:13:3:33
-UNDEFINED VARIABLE - record_different_fields_error.md:5:5:5:10
-UNDEFINED VARIABLE - record_different_fields_error.md:5:11:5:15
-UNDEFINED VARIABLE - record_different_fields_error.md:6:5:6:10
-MALFORMED TYPE - record_different_fields_error.md:6:20:6:27
-UNDEFINED VARIABLE - record_different_fields_error.md:7:5:7:10
+UNEXPECTED TOKEN IN EXPRESSION - record_different_fields_error.md:7:30:7:30
 # PROBLEMS
 **UNEXPECTED TOKEN IN TYPE ANNOTATION**
 The token **"leading underscore** is not expected in a type annotation.
@@ -277,6 +276,31 @@ Here is the problematic code:
                              
 
 
+**MALFORMED TYPE**
+This type annotation is malformed or contains invalid syntax.
+
+**MALFORMED TYPE**
+This type annotation is malformed or contains invalid syntax.
+
+**UNDEFINED VARIABLE**
+Nothing is named `kebab` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `case` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `field` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**MALFORMED TYPE**
+This type annotation is malformed or contains invalid syntax.
+
+**UNDEFINED VARIABLE**
+Nothing is named `field` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),Newline(1:1-1:1),
diff --git a/src/snapshots/records/record_different_fields_reserved_error.md b/src/snapshots/records/record_different_fields_reserved_error.md
index 095fac3781..b20da4d483 100644
--- a/src/snapshots/records/record_different_fields_reserved_error.md
+++ b/src/snapshots/records/record_different_fields_reserved_error.md
@@ -16,21 +16,22 @@ type=expr
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - record_different_fields_reserved_error.md:2:7:2:10
+PARSE ERROR - record_different_fields_reserved_error.md:2:22:2:22
 UNEXPECTED TOKEN IN TYPE ANNOTATION - record_different_fields_reserved_error.md:3:11:3:25
 UNEXPECTED TOKEN IN EXPRESSION - record_different_fields_reserved_error.md:3:12:3:26
 UNEXPECTED TOKEN IN EXPRESSION - record_different_fields_reserved_error.md:3:25:3:27
+UNEXPECTED TOKEN IN EXPRESSION - record_different_fields_reserved_error.md:3:26:3:26
 UNEXPECTED TOKEN IN EXPRESSION - record_different_fields_reserved_error.md:4:11:4:14
-import_must_be_top_level - record_different_fields_reserved_error.md:5:5:5:12
+UNEXPECTED TOKEN IN EXPRESSION - record_different_fields_reserved_error.md:4:29:4:29
+IMPORT MUST BE TOP LEVEL - record_different_fields_reserved_error.md:5:5:5:12
 UNEXPECTED TOKEN IN EXPRESSION - record_different_fields_reserved_error.md:5:11:5:14
+UNEXPECTED TOKEN IN EXPRESSION - record_different_fields_reserved_error.md:5:26:5:26
 UNEXPECTED TOKEN IN EXPRESSION - record_different_fields_reserved_error.md:6:5:6:9
 UNEXPECTED TOKEN IN EXPRESSION - record_different_fields_reserved_error.md:6:8:6:14
+UNEXPECTED TOKEN IN EXPRESSION - record_different_fields_reserved_error.md:6:19:6:19
 UNEXPECTED TOKEN IN EXPRESSION - record_different_fields_reserved_error.md:7:5:7:8
 UNEXPECTED TOKEN IN EXPRESSION - record_different_fields_reserved_error.md:7:7:7:13
-MALFORMED TYPE - record_different_fields_reserved_error.md:3:11:3:25
-not_implemented - record_different_fields_reserved_error.md:1:1:1:1
-not_implemented - record_different_fields_reserved_error.md:1:1:1:1
-UNDEFINED VARIABLE - record_different_fields_reserved_error.md:6:10:6:19
-UNDEFINED VARIABLE - record_different_fields_reserved_error.md:7:9:7:19
+UNEXPECTED TOKEN IN EXPRESSION - record_different_fields_reserved_error.md:7:19:7:19
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **: "** is not expected in an expression.
@@ -236,6 +237,25 @@ Here is the problematic code:
                   
 
 
+**MALFORMED TYPE**
+This type annotation is malformed or contains invalid syntax.
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: statement type in block
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: statement type in block
+Let us know if you want to help!
+
+**UNDEFINED VARIABLE**
+Nothing is named `true` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `false` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),Newline(1:1-1:1),
diff --git a/src/snapshots/records/record_extension_update.md b/src/snapshots/records/record_extension_update.md
index 2ee09c75fe..43624afa6a 100644
--- a/src/snapshots/records/record_extension_update.md
+++ b/src/snapshots/records/record_extension_update.md
@@ -8,9 +8,12 @@ type=expr
 { ..person, age: 31, active: True }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - record_extension_update.md:1:5:1:11
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `person` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),DoubleDot(1:3-1:5),LowerIdent(1:5-1:11),Comma(1:11-1:12),LowerIdent(1:13-1:16),OpColon(1:16-1:17),Int(1:18-1:20),Comma(1:20-1:21),LowerIdent(1:22-1:28),OpColon(1:28-1:29),UpperIdent(1:30-1:34),CloseCurly(1:35-1:36),EndOfFile(1:36-1:36),
diff --git a/src/snapshots/records/record_mixed_field_syntax.md b/src/snapshots/records/record_mixed_field_syntax.md
index c42d939b88..6083d44c11 100644
--- a/src/snapshots/records/record_mixed_field_syntax.md
+++ b/src/snapshots/records/record_mixed_field_syntax.md
@@ -8,11 +8,20 @@ type=expr
 { name, age: 30, email, status: "active", balance }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - record_mixed_field_syntax.md:1:3:1:8
-UNDEFINED VARIABLE - record_mixed_field_syntax.md:1:18:1:24
-UNDEFINED VARIABLE - record_mixed_field_syntax.md:1:43:1:52
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `name` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `email` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `balance` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),LowerIdent(1:3-1:7),Comma(1:7-1:8),LowerIdent(1:9-1:12),OpColon(1:12-1:13),Int(1:14-1:16),Comma(1:16-1:17),LowerIdent(1:18-1:23),Comma(1:23-1:24),LowerIdent(1:25-1:31),OpColon(1:31-1:32),StringStart(1:33-1:34),StringPart(1:34-1:40),StringEnd(1:40-1:41),Comma(1:41-1:42),LowerIdent(1:43-1:50),CloseCurly(1:51-1:52),EndOfFile(1:52-1:52),
diff --git a/src/snapshots/records/record_mixed_types.md b/src/snapshots/records/record_mixed_types.md
index 19e8665796..b72ab01fb9 100644
--- a/src/snapshots/records/record_mixed_types.md
+++ b/src/snapshots/records/record_mixed_types.md
@@ -8,9 +8,12 @@ type=expr
 { name: "Alice", age: 30, active: Bool.true, scores: [95, 87, 92], balance: 1250.75 }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - record_mixed_types.md:1:35:1:44
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `true` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),LowerIdent(1:3-1:7),OpColon(1:7-1:8),StringStart(1:9-1:10),StringPart(1:10-1:15),StringEnd(1:15-1:16),Comma(1:16-1:17),LowerIdent(1:18-1:21),OpColon(1:21-1:22),Int(1:23-1:25),Comma(1:25-1:26),LowerIdent(1:27-1:33),OpColon(1:33-1:34),UpperIdent(1:35-1:39),NoSpaceDotLowerIdent(1:39-1:44),Comma(1:44-1:45),LowerIdent(1:46-1:52),OpColon(1:52-1:53),OpenSquare(1:54-1:55),Int(1:55-1:57),Comma(1:57-1:58),Int(1:59-1:61),Comma(1:61-1:62),Int(1:63-1:65),CloseSquare(1:65-1:66),Comma(1:66-1:67),LowerIdent(1:68-1:75),OpColon(1:75-1:76),Float(1:77-1:84),CloseCurly(1:85-1:86),EndOfFile(1:86-1:86),
diff --git a/src/snapshots/records/record_shorthand_fields.md b/src/snapshots/records/record_shorthand_fields.md
index b480d4e923..61a926bb9c 100644
--- a/src/snapshots/records/record_shorthand_fields.md
+++ b/src/snapshots/records/record_shorthand_fields.md
@@ -8,12 +8,24 @@ type=expr
 { name, age, email, active }
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - record_shorthand_fields.md:1:3:1:8
-UNDEFINED VARIABLE - record_shorthand_fields.md:1:9:1:13
-UNDEFINED VARIABLE - record_shorthand_fields.md:1:14:1:20
-UNDEFINED VARIABLE - record_shorthand_fields.md:1:21:1:29
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `name` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `age` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `email` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `active` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),LowerIdent(1:3-1:7),Comma(1:7-1:8),LowerIdent(1:9-1:12),Comma(1:12-1:13),LowerIdent(1:14-1:19),Comma(1:19-1:20),LowerIdent(1:21-1:27),CloseCurly(1:28-1:29),EndOfFile(1:29-1:29),
diff --git a/src/snapshots/records/statement_record_destructure.md b/src/snapshots/records/statement_record_destructure.md
index f1f36ab282..57d2f1e27f 100644
--- a/src/snapshots/records/statement_record_destructure.md
+++ b/src/snapshots/records/statement_record_destructure.md
@@ -8,7 +8,7 @@ type=file
 { name, age, email } = person
 ~~~
 # EXPECTED
-missing_header - statement_record_destructure.md:1:1:1:7
+MISSING HEADER - statement_record_destructure.md:1:1:1:7
 UNEXPECTED TOKEN IN EXPRESSION - statement_record_destructure.md:1:7:1:12
 UNEXPECTED TOKEN IN EXPRESSION - statement_record_destructure.md:1:12:1:19
 UNEXPECTED TOKEN IN EXPRESSION - statement_record_destructure.md:1:20:1:23
@@ -78,6 +78,38 @@ Here is the problematic code:
                      ^^^^^^^^
 
 
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 # TOKENS
 ~~~zig
 OpenCurly(1:1-1:2),LowerIdent(1:3-1:7),Comma(1:7-1:8),LowerIdent(1:9-1:12),Comma(1:12-1:13),LowerIdent(1:14-1:19),CloseCurly(1:20-1:21),OpAssign(1:22-1:23),LowerIdent(1:24-1:30),EndOfFile(1:30-1:30),
diff --git a/src/snapshots/records/type_constrained_record.md b/src/snapshots/records/type_constrained_record.md
index ac134fcf77..4343f120d1 100644
--- a/src/snapshots/records/type_constrained_record.md
+++ b/src/snapshots/records/type_constrained_record.md
@@ -9,8 +9,7 @@ process_user! : { name : Str, age : U32, ..a } => Str
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN TYPE ANNOTATION - type_constrained_record.md:1:42:1:45
-expected_arrow - type_constrained_record.md:1:37:1:41
-MALFORMED TYPE - type_constrained_record.md:1:37:1:47
+PARSE ERROR - type_constrained_record.md:1:37:1:41
 # PROBLEMS
 **UNEXPECTED TOKEN IN TYPE ANNOTATION**
 The token **..a** is not expected in a type annotation.
@@ -36,6 +35,9 @@ process_user! : { name : Str, age : U32, ..a } => Str
                                     ^^^^
 
 
+**MALFORMED TYPE**
+This type annotation is malformed or contains invalid syntax.
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:14),OpColon(1:15-1:16),OpenCurly(1:17-1:18),LowerIdent(1:19-1:23),OpColon(1:24-1:25),UpperIdent(1:26-1:29),Comma(1:29-1:30),LowerIdent(1:31-1:34),OpColon(1:35-1:36),UpperIdent(1:37-1:40),Comma(1:40-1:41),DoubleDot(1:42-1:44),LowerIdent(1:44-1:45),CloseCurly(1:46-1:47),OpFatArrow(1:48-1:50),UpperIdent(1:51-1:54),EndOfFile(1:54-1:54),
diff --git a/src/snapshots/records/type_open_record.md b/src/snapshots/records/type_open_record.md
index 106b20432c..b819d41586 100644
--- a/src/snapshots/records/type_open_record.md
+++ b/src/snapshots/records/type_open_record.md
@@ -9,9 +9,8 @@ process_user! : { name : Str, age : U32, .. } => Str
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN TYPE ANNOTATION - type_open_record.md:1:42:1:46
-expected_arrow - type_open_record.md:1:37:1:41
-expected_ty_close_curly_or_comma - type_open_record.md:1:47:1:53
-MALFORMED TYPE - type_open_record.md:1:47:1:53
+PARSE ERROR - type_open_record.md:1:37:1:41
+PARSE ERROR - type_open_record.md:1:47:1:53
 # PROBLEMS
 **UNEXPECTED TOKEN IN TYPE ANNOTATION**
 The token **.. }** is not expected in a type annotation.
@@ -49,6 +48,9 @@ process_user! : { name : Str, age : U32, .. } => Str
                                               ^^^^^^
 
 
+**MALFORMED TYPE**
+This type annotation is malformed or contains invalid syntax.
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:14),OpColon(1:15-1:16),OpenCurly(1:17-1:18),LowerIdent(1:19-1:23),OpColon(1:24-1:25),UpperIdent(1:26-1:29),Comma(1:29-1:30),LowerIdent(1:31-1:34),OpColon(1:35-1:36),UpperIdent(1:37-1:40),Comma(1:40-1:41),DoubleDot(1:42-1:44),CloseCurly(1:45-1:46),OpFatArrow(1:47-1:49),UpperIdent(1:50-1:53),EndOfFile(1:53-1:53),
diff --git a/src/snapshots/rigid_var_instantiation.md b/src/snapshots/rigid_var_instantiation.md
index 327ca2cf24..c6c6973289 100644
--- a/src/snapshots/rigid_var_instantiation.md
+++ b/src/snapshots/rigid_var_instantiation.md
@@ -30,7 +30,42 @@ UNUSED VARIABLE - rigid_var_instantiation.md:13:5:13:8
 UNUSED VARIABLE - rigid_var_instantiation.md:10:5:10:8
 UNUSED VARIABLE - rigid_var_instantiation.md:16:5:16:8
 # PROBLEMS
-NIL
+**UNUSED VARIABLE**
+Variable ``str`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_str` to suppress this warning.
+The unused variable is declared here:
+**rigid_var_instantiation.md:13:5:13:8:**
+```roc
+    str = identity("hello")
+```
+    ^^^
+
+
+**UNUSED VARIABLE**
+Variable ``num`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_num` to suppress this warning.
+The unused variable is declared here:
+**rigid_var_instantiation.md:10:5:10:8:**
+```roc
+    num = identity(42)
+```
+    ^^^
+
+
+**UNUSED VARIABLE**
+Variable ``lst`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_lst` to suppress this warning.
+The unused variable is declared here:
+**rigid_var_instantiation.md:16:5:16:8:**
+```roc
+    lst = identity([1, 2, 3])
+```
+    ^^^
+
+
 # TOKENS
 ~~~zig
 KwApp(1:1-1:4),OpenSquare(1:5-1:6),LowerIdent(1:6-1:11),CloseSquare(1:11-1:12),OpenCurly(1:13-1:14),LowerIdent(1:15-1:17),OpColon(1:17-1:18),KwPlatform(1:19-1:27),StringStart(1:28-1:29),StringPart(1:29-1:54),StringEnd(1:54-1:55),CloseCurly(1:56-1:57),Newline(1:1-1:1),
diff --git a/src/snapshots/rigid_var_no_instantiation_error.md b/src/snapshots/rigid_var_no_instantiation_error.md
index 66b0d2d971..ce8045ee52 100644
--- a/src/snapshots/rigid_var_no_instantiation_error.md
+++ b/src/snapshots/rigid_var_no_instantiation_error.md
@@ -32,12 +32,7 @@ main! = |_| {
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - rigid_var_no_instantiation_error.md:6:12:6:18
-UNDEFINED VARIABLE - rigid_var_no_instantiation_error.md:6:6:6:7
-UNDEFINED VARIABLE - rigid_var_no_instantiation_error.md:6:9:6:10
-UNDEFINED VARIABLE - rigid_var_no_instantiation_error.md:7:6:7:7
-UNDEFINED VARIABLE - rigid_var_no_instantiation_error.md:7:9:7:10
-UNDEFINED VARIABLE - rigid_var_no_instantiation_error.md:17:21:17:30
-UNUSED VARIABLE - rigid_var_no_instantiation_error.md:13:5:13:12
+UNDEFINED VARIABLE - rigid_var_no_instantiation_error.md:13:5:13:12
 UNUSED VARIABLE - rigid_var_no_instantiation_error.md:17:5:17:12
 UNUSED VARIABLE - rigid_var_no_instantiation_error.md:21:5:21:12
 # PROBLEMS
@@ -53,6 +48,62 @@ Here is the problematic code:
            ^^^^^^
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `y` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `y` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `x` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `true` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNUSED VARIABLE**
+Variable ``result1`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_result1` to suppress this warning.
+The unused variable is declared here:
+**rigid_var_no_instantiation_error.md:13:5:13:12:**
+```roc
+    result1 = swap((42, "hello"))
+```
+    ^^^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``result2`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_result2` to suppress this warning.
+The unused variable is declared here:
+**rigid_var_no_instantiation_error.md:17:5:17:12:**
+```roc
+    result2 = swap((Bool.true, [1, 2, 3]))
+```
+    ^^^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``result3`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_result3` to suppress this warning.
+The unused variable is declared here:
+**rigid_var_no_instantiation_error.md:21:5:21:12:**
+```roc
+    result3 = swap(("foo", "bar"))
+```
+    ^^^^^^^
+
+
 # TOKENS
 ~~~zig
 KwApp(1:1-1:4),OpenSquare(1:5-1:6),LowerIdent(1:6-1:11),CloseSquare(1:11-1:12),OpenCurly(1:13-1:14),LowerIdent(1:15-1:17),OpColon(1:17-1:18),KwPlatform(1:19-1:27),StringStart(1:28-1:29),StringPart(1:29-1:54),StringEnd(1:54-1:55),CloseCurly(1:56-1:57),Newline(1:1-1:1),
diff --git a/src/snapshots/simple_external_lookup.md b/src/snapshots/simple_external_lookup.md
index dc1cd5d327..c23412e288 100644
--- a/src/snapshots/simple_external_lookup.md
+++ b/src/snapshots/simple_external_lookup.md
@@ -8,9 +8,12 @@ type=expr
 List.map
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - simple_external_lookup.md:1:1:1:9
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `map` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 UpperIdent(1:1-1:5),NoSpaceDotLowerIdent(1:5-1:9),EndOfFile(1:9-1:9),
diff --git a/src/snapshots/static_dispatch_super_test.md b/src/snapshots/static_dispatch_super_test.md
index 9dc66a6848..3c9acf7ae6 100644
--- a/src/snapshots/static_dispatch_super_test.md
+++ b/src/snapshots/static_dispatch_super_test.md
@@ -8,9 +8,12 @@ type=expr
 some_fn(arg1)?.static_dispatch_method()?.next_static_dispatch_method()?.record_field?
 ~~~
 # EXPECTED
-not_implemented - static_dispatch_super_test.md:1:1:1:1
-# PROBLEMS
 NIL
+# PROBLEMS
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize suffix_single_question expression
+Let us know if you want to help!
+
 # TOKENS
 ~~~zig
 LowerIdent(1:1-1:8),NoSpaceOpenRound(1:8-1:9),LowerIdent(1:9-1:13),CloseRound(1:13-1:14),NoSpaceOpQuestion(1:14-1:15),NoSpaceDotLowerIdent(1:15-1:38),NoSpaceOpenRound(1:38-1:39),CloseRound(1:39-1:40),NoSpaceOpQuestion(1:40-1:41),NoSpaceDotLowerIdent(1:41-1:69),NoSpaceOpenRound(1:69-1:70),CloseRound(1:70-1:71),NoSpaceOpQuestion(1:71-1:72),NoSpaceDotLowerIdent(1:72-1:85),NoSpaceOpQuestion(1:85-1:86),EndOfFile(1:86-1:86),
diff --git a/src/snapshots/string.md b/src/snapshots/string.md
index 9164e2b9f5..0b9a57ac52 100644
--- a/src/snapshots/string.md
+++ b/src/snapshots/string.md
@@ -14,7 +14,14 @@ module []
 # EXPECTED
 NIL
 # PROBLEMS
-NIL
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 # TOKENS
 ~~~zig
 KwModule(1:1-1:7),OpenSquare(1:8-1:9),CloseSquare(1:9-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/string_multiline_formatting_(due_to_templating_not_multiline_string_literal)_1.md b/src/snapshots/string_multiline_formatting_(due_to_templating_not_multiline_string_literal)_1.md
index a978f4ae6a..d78e504d46 100644
--- a/src/snapshots/string_multiline_formatting_(due_to_templating_not_multiline_string_literal)_1.md
+++ b/src/snapshots/string_multiline_formatting_(due_to_templating_not_multiline_string_literal)_1.md
@@ -9,11 +9,20 @@ type=expr
 b)} lines of text due to the template parts"
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - string_multiline_formatting_(due_to_templating_not_multiline_string_literal)_1.md:1:26:1:35
-UNDEFINED VARIABLE - string_multiline_formatting_(due_to_templating_not_multiline_string_literal)_1.md:1:36:1:37
-UNDEFINED VARIABLE - string_multiline_formatting_(due_to_templating_not_multiline_string_literal)_1.md:2:1:2:2
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `some_func` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `a` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `b` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 StringStart(1:1-1:2),StringPart(1:2-1:24),OpenStringInterpolation(1:24-1:26),LowerIdent(1:26-1:35),NoSpaceOpenRound(1:35-1:36),LowerIdent(1:36-1:37),Comma(1:37-1:38),Newline(1:40-1:57),
diff --git a/src/snapshots/string_multiline_formatting_(due_to_templating_not_multiline_string_literal)_3.md b/src/snapshots/string_multiline_formatting_(due_to_templating_not_multiline_string_literal)_3.md
index 9eb05a1ad8..a22589e6e4 100644
--- a/src/snapshots/string_multiline_formatting_(due_to_templating_not_multiline_string_literal)_3.md
+++ b/src/snapshots/string_multiline_formatting_(due_to_templating_not_multiline_string_literal)_3.md
@@ -13,11 +13,20 @@ type=expr
 } lines of text due to the template parts"
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - string_multiline_formatting_(due_to_templating_not_multiline_string_literal)_3.md:2:2:2:11
-UNDEFINED VARIABLE - string_multiline_formatting_(due_to_templating_not_multiline_string_literal)_3.md:3:3:3:4
-UNDEFINED VARIABLE - string_multiline_formatting_(due_to_templating_not_multiline_string_literal)_3.md:4:3:4:4
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `some_func` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `a` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `b` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 StringStart(1:1-1:2),StringPart(1:2-1:24),OpenStringInterpolation(1:24-1:26),Newline(1:1-1:1),
diff --git a/src/snapshots/syntax_grab_bag.md b/src/snapshots/syntax_grab_bag.md
index 833b3fe864..1ed23cd764 100644
--- a/src/snapshots/syntax_grab_bag.md
+++ b/src/snapshots/syntax_grab_bag.md
@@ -218,70 +218,6 @@ UNEXPECTED TOKEN IN EXPRESSION - syntax_grab_bag.md:89:9:90:4
 UNEXPECTED TOKEN IN PATTERN - syntax_grab_bag.md:90:3:90:28
 UNEXPECTED TOKEN IN EXPRESSION - syntax_grab_bag.md:90:6:91:9
 UNEXPECTED TOKEN IN EXPRESSION - syntax_grab_bag.md:1:1:92:4
-UNEXPECTED TOKEN IN PATTERN - syntax_grab_bag.md:92:3:92:8
-UNEXPECTED TOKEN IN PATTERN - syntax_grab_bag.md:93:4:93:8
-UNDECLARED TYPE - syntax_grab_bag.md:36:8:36:11
-UNDECLARED TYPE - syntax_grab_bag.md:36:13:36:16
-UNDECLARED TYPE - syntax_grab_bag.md:39:2:39:5
-UNDECLARED TYPE - syntax_grab_bag.md:40:2:40:5
-UNDECLARED TYPE - syntax_grab_bag.md:43:19:43:21
-UNDECLARED TYPE - syntax_grab_bag.md:43:32:43:41
-UNDECLARED TYPE - syntax_grab_bag.md:45:8:45:10
-UNDECLARED TYPE - syntax_grab_bag.md:46:8:46:17
-UNDECLARED TYPE - syntax_grab_bag.md:52:4:52:6
-UNDECLARED TYPE - syntax_grab_bag.md:53:8:53:17
-not_implemented - syntax_grab_bag.md:6:1:12:4
-not_implemented - syntax_grab_bag.md:1:1:1:1
-not_implemented - syntax_grab_bag.md:1:1:1:1
-not_implemented - syntax_grab_bag.md:1:1:1:1
-not_implemented - syntax_grab_bag.md:1:1:1:1
-not_implemented - syntax_grab_bag.md:1:1:1:1
-expr_not_canonicalized - syntax_grab_bag.md:89:9:90:4
-expr_not_canonicalized - syntax_grab_bag.md:90:6:91:9
-expr_not_canonicalized - syntax_grab_bag.md:1:1:92:4
-UNUSED VARIABLE - syntax_grab_bag.md:97:3:97:8
-not_implemented - syntax_grab_bag.md:1:1:1:1
-UNUSED VARIABLE - syntax_grab_bag.md:102:19:102:23
-not_implemented - syntax_grab_bag.md:1:1:1:1
-UNUSED VARIABLE - syntax_grab_bag.md:108:23:108:27
-not_implemented - syntax_grab_bag.md:1:1:1:1
-UNUSED VARIABLE - syntax_grab_bag.md:115:6:115:10
-not_implemented - syntax_grab_bag.md:1:1:1:1
-not_implemented - syntax_grab_bag.md:1:1:1:1
-not_implemented - syntax_grab_bag.md:121:5:121:12
-not_implemented - syntax_grab_bag.md:1:1:1:1
-not_implemented - syntax_grab_bag.md:123:4:125:8
-not_implemented - syntax_grab_bag.md:130:5:130:12
-not_implemented - syntax_grab_bag.md:132:4:132:11
-UNUSED VARIABLE - syntax_grab_bag.md:82:2:82:3
-not_implemented - syntax_grab_bag.md:1:1:1:1
-UNDECLARED TYPE - syntax_grab_bag.md:143:14:143:20
-not_implemented - syntax_grab_bag.md:1:1:1:1
-not_implemented - syntax_grab_bag.md:1:1:1:1
-not_implemented - syntax_grab_bag.md:154:2:154:5
-not_implemented - syntax_grab_bag.md:156:3:156:6
-UNDEFINED VARIABLE - syntax_grab_bag.md:158:2:158:11
-not_implemented - syntax_grab_bag.md:1:1:1:1
-not_implemented - syntax_grab_bag.md:162:2:163:49
-not_implemented - syntax_grab_bag.md:1:1:1:1
-not_implemented - syntax_grab_bag.md:1:1:1:1
-UNDEFINED VARIABLE - syntax_grab_bag.md:178:63:178:71
-UNDEFINED VARIABLE - syntax_grab_bag.md:179:42:179:48
-UNDEFINED VARIABLE - syntax_grab_bag.md:183:3:183:7
-UNDEFINED VARIABLE - syntax_grab_bag.md:185:4:185:10
-UNDEFINED VARIABLE - syntax_grab_bag.md:188:22:188:25
-not_implemented - syntax_grab_bag.md:1:1:1:1
-not_implemented - syntax_grab_bag.md:1:1:1:1
-UNDEFINED VARIABLE - syntax_grab_bag.md:193:4:193:13
-UNUSED VARIABLE - syntax_grab_bag.md:180:2:180:17
-UNUSED VARIABLE - syntax_grab_bag.md:178:2:178:8
-UNUSED VARIABLE - syntax_grab_bag.md:164:2:164:18
-UNUSED VARIABLE - syntax_grab_bag.md:166:2:166:6
-UNUSED VARIABLE - syntax_grab_bag.md:188:2:188:15
-UNUSED VARIABLE - syntax_grab_bag.md:189:2:189:23
-UNUSED VARIABLE - syntax_grab_bag.md:165:2:165:14
-UNDECLARED TYPE - syntax_grab_bag.md:201:9:201:14
-not_implemented - syntax_grab_bag.md:1:1:1:1
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token ** After pattern in alt
@@ -538,6 +474,443 @@ Here is the problematic code:
    ^^^^
 
 
+**UNDECLARED TYPE**
+The type ``Bar`` is not declared in this scope.
+
+This type is referenced here:
+**syntax_grab_bag.md:36:8:36:11:**
+```roc
+Foo : (Bar, Baz)
+```
+       ^^^
+
+
+**UNDECLARED TYPE**
+The type ``Baz`` is not declared in this scope.
+
+This type is referenced here:
+**syntax_grab_bag.md:36:13:36:16:**
+```roc
+Foo : (Bar, Baz)
+```
+            ^^^
+
+
+**UNDECLARED TYPE**
+The type ``Bar`` is not declared in this scope.
+
+This type is referenced here:
+**syntax_grab_bag.md:39:2:39:5:**
+```roc
+	Bar, # Comment after pattern tuple item
+```
+ ^^^
+
+
+**UNDECLARED TYPE**
+The type ``Baz`` is not declared in this scope.
+
+This type is referenced here:
+**syntax_grab_bag.md:40:2:40:5:**
+```roc
+	Baz, # Another after pattern tuple item
+```
+ ^^^
+
+
+**UNDECLARED TYPE**
+The type ``Ok`` is not declared in this scope.
+
+This type is referenced here:
+**syntax_grab_bag.md:43:19:43:21:**
+```roc
+Some(a) : { foo : Ok(a), bar : Something }
+```
+                  ^^
+
+
+**UNDECLARED TYPE**
+The type ``Something`` is not declared in this scope.
+
+This type is referenced here:
+**syntax_grab_bag.md:43:32:43:41:**
+```roc
+Some(a) : { foo : Ok(a), bar : Something }
+```
+                               ^^^^^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Ok`` is not declared in this scope.
+
+This type is referenced here:
+**syntax_grab_bag.md:45:8:45:10:**
+```roc
+	foo : Ok(a), # After field
+```
+       ^^
+
+
+**UNDECLARED TYPE**
+The type ``Something`` is not declared in this scope.
+
+This type is referenced here:
+**syntax_grab_bag.md:46:8:46:17:**
+```roc
+	bar : Something, # After last field
+```
+       ^^^^^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Ok`` is not declared in this scope.
+
+This type is referenced here:
+**syntax_grab_bag.md:52:4:52:6:**
+```roc
+			Ok(a), # Comment after pattern record field
+```
+   ^^
+
+
+**UNDECLARED TYPE**
+The type ``Something`` is not declared in this scope.
+
+This type is referenced here:
+**syntax_grab_bag.md:53:8:53:17:**
+```roc
+	bar : Something, # Another after pattern record field
+```
+       ^^^^^^^^^
+
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: malformed import module name contains invalid control characters
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: Exposed item 'line!' already imported from module 'pf.Stdout', cannot import again from module 'MALFORMED_IMPORT'
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: Exposed item 'write!' already imported from module 'pf.Stdout', cannot import again from module 'MALFORMED_IMPORT'
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize dbg expression
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize dbg expression
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize alternatives pattern
+Let us know if you want to help!
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**UNKNOWN OPERATOR**
+This looks like an operator, but it's not one I recognize!
+Check the spelling and make sure you're using a valid Roc operator.
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**INVALID PATTERN**
+This pattern contains invalid syntax or uses unsupported features.
+
+**UNUSED VARIABLE**
+Variable ``lower`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_lower` to suppress this warning.
+The unused variable is declared here:
+**syntax_grab_bag.md:97:3:97:8:**
+```roc
+		lower # After pattern comment
+```
+  ^^^^^
+
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize alternatives pattern
+Let us know if you want to help!
+
+**UNUSED VARIABLE**
+Variable ``rest`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_rest` to suppress this warning.
+The unused variable is declared here:
+**syntax_grab_bag.md:102:19:102:23:**
+```roc
+		[1, 2, 3, .. as rest] # After pattern comment
+```
+                  ^^^^
+
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize alternatives pattern
+Let us know if you want to help!
+
+**UNUSED VARIABLE**
+Variable ``rest`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_rest` to suppress this warning.
+The unused variable is declared here:
+**syntax_grab_bag.md:108:23:108:27:**
+```roc
+		[1, 2 | 5, 3, .. as rest] => 123
+```
+                      ^^^^
+
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize alternatives pattern
+Let us know if you want to help!
+
+**UNUSED VARIABLE**
+Variable ``rest`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_rest` to suppress this warning.
+The unused variable is declared here:
+**syntax_grab_bag.md:115:6:115:10:**
+```roc
+					rest, # After last pattern in list
+```
+     ^^^^
+
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize alternatives pattern
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize alternatives pattern
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: record pattern with sub-patterns
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize local_dispatch expression
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: record pattern with sub-patterns
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: record pattern with sub-patterns
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: record pattern with sub-patterns
+Let us know if you want to help!
+
+**UNUSED VARIABLE**
+Variable ``b`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_b` to suppress this warning.
+The unused variable is declared here:
+**syntax_grab_bag.md:82:2:82:3:**
+```roc
+	b,
+```
+ ^
+
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: top-level expect
+Let us know if you want to help!
+
+**UNDECLARED TYPE**
+The type ``String`` is not declared in this scope.
+
+This type is referenced here:
+**syntax_grab_bag.md:143:14:143:20:**
+```roc
+main! : List(String) -> Result({}, _)
+```
+             ^^^^^^
+
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: statement type in block
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: statement type in block
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: ...
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: ...
+Let us know if you want to help!
+
+**UNDEFINED VARIABLE**
+Nothing is named `some_func` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize dbg expression
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: crash statement
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize dbg expression
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: statement type in block
+Let us know if you want to help!
+
+**UNDEFINED VARIABLE**
+Nothing is named `punned` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `nested` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `tag1` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `nested` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `foo` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize suffix_single_question expression
+Let us know if you want to help!
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: canonicalize suffix_single_question expression
+Let us know if you want to help!
+
+**UNDEFINED VARIABLE**
+Nothing is named `toStr` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNUSED VARIABLE**
+Variable ``multiline_tuple`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_multiline_tuple` to suppress this warning.
+The unused variable is declared here:
+**syntax_grab_bag.md:180:2:180:17:**
+```roc
+	multiline_tuple = (
+```
+ ^^^^^^^^^^^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``record`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_record` to suppress this warning.
+The unused variable is declared here:
+**syntax_grab_bag.md:178:2:178:8:**
+```roc
+	record = { foo: 123, bar: "Hello", baz: tag, qux: Ok(world), punned }
+```
+ ^^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``tag_with_payload`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_tag_with_payload` to suppress this warning.
+The unused variable is declared here:
+**syntax_grab_bag.md:164:2:164:18:**
+```roc
+	tag_with_payload = Ok(number)
+```
+ ^^^^^^^^^^^^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``list`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_list` to suppress this warning.
+The unused variable is declared here:
+**syntax_grab_bag.md:166:2:166:6:**
+```roc
+	list = [
+```
+ ^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``bin_op_result`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_bin_op_result` to suppress this warning.
+The unused variable is declared here:
+**syntax_grab_bag.md:188:2:188:15:**
+```roc
+	bin_op_result = Err(foo) ?? 12 > 5 * 5 or 13 + 2 < 5 and 10 - 1 >= 16 or 12 <= 3 / 5
+```
+ ^^^^^^^^^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``static_dispatch_style`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_static_dispatch_style` to suppress this warning.
+The unused variable is declared here:
+**syntax_grab_bag.md:189:2:189:23:**
+```roc
+	static_dispatch_style = some_fn(arg1)?.static_dispatch_method()?.next_static_dispatch_method()?.record_field?
+```
+ ^^^^^^^^^^^^^^^^^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``interpolated`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_interpolated` to suppress this warning.
+The unused variable is declared here:
+**syntax_grab_bag.md:165:2:165:14:**
+```roc
+	interpolated = "Hello, ${world}"
+```
+ ^^^^^^^^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Value`` is not declared in this scope.
+
+This type is referenced here:
+**syntax_grab_bag.md:201:9:201:14:**
+```roc
+tuple : Value((a, b, c))
+```
+        ^^^^^
+
+
+**NOT IMPLEMENTED**
+This feature is not yet implemented or doesn't have a proper error report yet: top-level expect
+Let us know if you want to help!
+
 **TYPE MISMATCH**
 This expression is used in an unexpected way:
 **syntax_grab_bag.md:68:1:68:8:**
diff --git a/src/snapshots/type_alias_decl.md b/src/snapshots/type_alias_decl.md
index 7367394e5f..5baec0c49e 100644
--- a/src/snapshots/type_alias_decl.md
+++ b/src/snapshots/type_alias_decl.md
@@ -46,12 +46,7 @@ main! = |_| {
 }
 ~~~
 # EXPECTED
-UNEXPECTED TOKEN IN EXPRESSION - type_alias_decl.md:1:1:30:11
-UNEXPECTED TOKEN IN EXPRESSION - type_alias_decl.md:1:1:33:11
-UNEXPECTED TOKEN IN EXPRESSION - type_alias_decl.md:1:1:36:10
-TYPE REDECLARED - type_alias_decl.md:7:1:7:37
-UNUSED VARIABLE - type_alias_decl.md:36:5:36:10
-UNUSED VARIABLE - type_alias_decl.md:33:5:33:11
+NIL
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **app [main!] { pf: platform "../basic-cli/main.roc" }
@@ -278,6 +273,48 @@ main! = |_| {
 ```
 
 
+**TYPE REDECLARED**
+The type ``Result`` is being redeclared.
+
+The redeclaration is here:
+**type_alias_decl.md:7:1:7:37:**
+```roc
+Result(ok, err) : [Ok(ok), Err(err)]
+```
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+But ``Result`` was already declared here:
+**type_alias_decl.md:1:1:1:1:**
+```roc
+app [main!] { pf: platform "../basic-cli/main.roc" }
+```
+
+
+
+**UNUSED VARIABLE**
+Variable ``color`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_color` to suppress this warning.
+The unused variable is declared here:
+**type_alias_decl.md:36:5:36:10:**
+```roc
+    color = Red
+```
+    ^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``person`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_person` to suppress this warning.
+The unused variable is declared here:
+**type_alias_decl.md:33:5:33:11:**
+```roc
+    person = { name: "Alice", age: 30 }
+```
+    ^^^^^^
+
+
 # TOKENS
 ~~~zig
 KwApp(1:1-1:4),OpenSquare(1:5-1:6),LowerIdent(1:6-1:11),CloseSquare(1:11-1:12),OpenCurly(1:13-1:14),LowerIdent(1:15-1:17),OpColon(1:17-1:18),KwPlatform(1:19-1:27),StringStart(1:28-1:29),StringPart(1:29-1:50),StringEnd(1:50-1:51),CloseCurly(1:52-1:53),Newline(1:1-1:1),
diff --git a/src/snapshots/type_alias_parameterized.md b/src/snapshots/type_alias_parameterized.md
index 4ea7667363..ff77da05a3 100644
--- a/src/snapshots/type_alias_parameterized.md
+++ b/src/snapshots/type_alias_parameterized.md
@@ -15,7 +15,7 @@ swapPair = |(x, y)| (y, x)
 main! = |_| swapPair(1, 2)
 ~~~
 # EXPECTED
-NIL
+TYPE MISMATCH - type_alias_parameterized.md:8:13:8:21
 # PROBLEMS
 **TYPE MISMATCH**
 This expression is used in an unexpected way:
diff --git a/src/snapshots/type_annotation_basic.md b/src/snapshots/type_annotation_basic.md
index 8f913a850c..83a896446f 100644
--- a/src/snapshots/type_annotation_basic.md
+++ b/src/snapshots/type_annotation_basic.md
@@ -36,7 +36,18 @@ main! = |_| {
 # EXPECTED
 UNUSED VARIABLE - type_annotation_basic.md:21:5:21:9
 # PROBLEMS
-NIL
+**UNUSED VARIABLE**
+Variable ``pair`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_pair` to suppress this warning.
+The unused variable is declared here:
+**type_annotation_basic.md:21:5:21:9:**
+```roc
+    pair = combine(num, text)
+```
+    ^^^^
+
+
 # TOKENS
 ~~~zig
 KwApp(1:1-1:4),OpenSquare(1:5-1:6),LowerIdent(1:6-1:11),CloseSquare(1:11-1:12),OpenCurly(1:13-1:14),LowerIdent(1:15-1:17),OpColon(1:17-1:18),KwPlatform(1:19-1:27),StringStart(1:28-1:29),StringPart(1:29-1:50),StringEnd(1:50-1:51),CloseCurly(1:52-1:53),Newline(1:1-1:1),
diff --git a/src/snapshots/type_annotation_missing_parens.md b/src/snapshots/type_annotation_missing_parens.md
index 7e1997606f..c56b1bb5c8 100644
--- a/src/snapshots/type_annotation_missing_parens.md
+++ b/src/snapshots/type_annotation_missing_parens.md
@@ -10,7 +10,7 @@ module [nums]
 nums : List U8
 ~~~
 # EXPECTED
-expected_colon_after_type_annotation - type_annotation_missing_parens.md:3:15:3:15
+PARSE ERROR - type_annotation_missing_parens.md:3:15:3:15
 # PROBLEMS
 **PARSE ERROR**
 Type applications require parentheses around their type arguments.
diff --git a/src/snapshots/type_annotations.md b/src/snapshots/type_annotations.md
index feb8aa3732..f42e1108c3 100644
--- a/src/snapshots/type_annotations.md
+++ b/src/snapshots/type_annotations.md
@@ -19,7 +19,39 @@ UNDECLARED TYPE - type_annotations.md:4:7:4:12
 UNDECLARED TYPE - type_annotations.md:7:14:7:20
 UNDECLARED TYPE - type_annotations.md:8:13:8:18
 # PROBLEMS
-NIL
+**UNDECLARED TYPE**
+The type ``Thing`` is not declared in this scope.
+
+This type is referenced here:
+**type_annotations.md:4:7:4:12:**
+```roc
+bar : Thing(a, b, _)
+```
+      ^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``String`` is not declared in this scope.
+
+This type is referenced here:
+**type_annotations.md:7:14:7:20:**
+```roc
+main! : List(String) -> Result({}, _)
+```
+             ^^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Value`` is not declared in this scope.
+
+This type is referenced here:
+**type_annotations.md:8:13:8:18:**
+```roc
+tag_tuple : Value((a, b, c))
+```
+            ^^^^^
+
+
 # TOKENS
 ~~~zig
 KwModule(1:1-1:7),OpenSquare(1:8-1:9),CloseSquare(1:9-1:10),Newline(1:1-1:1),
diff --git a/src/snapshots/type_app_complex_nested.md b/src/snapshots/type_app_complex_nested.md
index 28f6b5b945..e2f24a715b 100644
--- a/src/snapshots/type_app_complex_nested.md
+++ b/src/snapshots/type_app_complex_nested.md
@@ -46,6 +46,91 @@ deepNested = |_| crash "not implemented"
                  ^^^^^^^
 
 
+**UNDECLARED TYPE**
+The type ``Maybe`` is not declared in this scope.
+
+This type is referenced here:
+**type_app_complex_nested.md:16:33:16:38:**
+```roc
+ComplexType(a, b) : Result(List(Maybe(a)), Dict(Str, Error(b)))
+```
+                                ^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Error`` is not declared in this scope.
+
+This type is referenced here:
+**type_app_complex_nested.md:16:54:16:59:**
+```roc
+ComplexType(a, b) : Result(List(Maybe(a)), Dict(Str, Error(b)))
+```
+                                                     ^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Maybe`` is not declared in this scope.
+
+This type is referenced here:
+**type_app_complex_nested.md:4:30:4:35:**
+```roc
+processComplex : Result(List(Maybe(a)), Dict(Str, Error(b))) -> List(a)
+```
+                             ^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Error`` is not declared in this scope.
+
+This type is referenced here:
+**type_app_complex_nested.md:4:51:4:56:**
+```roc
+processComplex : Result(List(Maybe(a)), Dict(Str, Error(b))) -> List(a)
+```
+                                                  ^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``maybeList`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_maybeList` to suppress this warning.
+The unused variable is declared here:
+**type_app_complex_nested.md:7:12:7:21:**
+```roc
+        Ok(maybeList) => []
+```
+           ^^^^^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Maybe`` is not declared in this scope.
+
+This type is referenced here:
+**type_app_complex_nested.md:12:14:12:19:**
+```roc
+deepNested : Maybe(Result(List(Dict(Str, a)), b)) -> a
+```
+             ^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``Maybe`` is not declared in this scope.
+
+This type is referenced here:
+**type_app_complex_nested.md:13:1:13:11:**
+```roc
+deepNested = |_| crash "not implemented"
+```
+^^^^^^^^^^
+
+
+**INVALID LAMBDA**
+The body of this lambda expression is not valid.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 # TOKENS
 ~~~zig
 KwApp(1:1-1:4),OpenSquare(1:5-1:6),LowerIdent(1:6-1:11),CloseSquare(1:11-1:12),OpenCurly(1:13-1:14),LowerIdent(1:15-1:17),OpColon(1:17-1:18),KwPlatform(1:19-1:27),StringStart(1:28-1:29),StringPart(1:29-1:50),StringEnd(1:50-1:51),CloseCurly(1:52-1:53),Newline(1:1-1:1),
diff --git a/src/snapshots/type_app_multiple_args.md b/src/snapshots/type_app_multiple_args.md
index e88c87d3a1..277213e574 100644
--- a/src/snapshots/type_app_multiple_args.md
+++ b/src/snapshots/type_app_multiple_args.md
@@ -13,9 +13,12 @@ processDict = |_dict| []
 main! = |_| processDict(Dict.empty().insert("one", 1))
 ~~~
 # EXPECTED
-UNDEFINED VARIABLE - type_app_multiple_args.md:6:25:6:35
-# PROBLEMS
 NIL
+# PROBLEMS
+**UNDEFINED VARIABLE**
+Nothing is named `empty` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 KwApp(1:1-1:4),OpenSquare(1:5-1:6),LowerIdent(1:6-1:11),CloseSquare(1:11-1:12),OpenCurly(1:13-1:14),LowerIdent(1:15-1:17),OpColon(1:17-1:18),KwPlatform(1:19-1:27),StringStart(1:28-1:29),StringPart(1:29-1:50),StringEnd(1:50-1:51),CloseCurly(1:52-1:53),Newline(1:1-1:1),
diff --git a/src/snapshots/type_app_nested.md b/src/snapshots/type_app_nested.md
index 712e5ea3aa..616c75f1f6 100644
--- a/src/snapshots/type_app_nested.md
+++ b/src/snapshots/type_app_nested.md
@@ -15,7 +15,17 @@ main! = |_| processNested([])
 # EXPECTED
 UNDECLARED TYPE - type_app_nested.md:3:34:3:37
 # PROBLEMS
-NIL
+**UNDECLARED TYPE**
+The type ``Err`` is not declared in this scope.
+
+This type is referenced here:
+**type_app_nested.md:3:34:3:37:**
+```roc
+processNested : List(Result(Str, Err)) -> List(Str)
+```
+                                 ^^^
+
+
 # TOKENS
 ~~~zig
 KwApp(1:1-1:4),OpenSquare(1:5-1:6),LowerIdent(1:6-1:11),CloseSquare(1:11-1:12),OpenCurly(1:13-1:14),LowerIdent(1:15-1:17),OpColon(1:17-1:18),KwPlatform(1:19-1:27),StringStart(1:28-1:29),StringPart(1:29-1:50),StringEnd(1:50-1:51),CloseCurly(1:52-1:53),Newline(1:1-1:1),
diff --git a/src/snapshots/type_app_with_vars.md b/src/snapshots/type_app_with_vars.md
index 9ad1b0c3c9..68708cac64 100644
--- a/src/snapshots/type_app_with_vars.md
+++ b/src/snapshots/type_app_with_vars.md
@@ -13,7 +13,7 @@ mapList = |list, fn| list.map(fn)
 main! = |_| mapList([1,2,3,4,5])
 ~~~
 # EXPECTED
-NIL
+TYPE MISMATCH - type_app_with_vars.md:6:13:6:20
 # PROBLEMS
 **TYPE MISMATCH**
 This expression is used in an unexpected way:
diff --git a/src/snapshots/type_checking/u8_annotation_large_value.md b/src/snapshots/type_checking/u8_annotation_large_value.md
index ee3ecef6f0..fb1c5931c4 100644
--- a/src/snapshots/type_checking/u8_annotation_large_value.md
+++ b/src/snapshots/type_checking/u8_annotation_large_value.md
@@ -11,7 +11,7 @@ x : U8
 x = 500
 ~~~
 # EXPECTED
-NIL
+NUMBER DOES NOT FIT IN TYPE - u8_annotation_large_value.md:4:5:4:8
 # PROBLEMS
 **NUMBER DOES NOT FIT IN TYPE**
 The number **500** does not fit in its inferred type:
diff --git a/src/snapshots/type_checking/u8_negative_value.md b/src/snapshots/type_checking/u8_negative_value.md
index c8297d8caa..95c57d350b 100644
--- a/src/snapshots/type_checking/u8_negative_value.md
+++ b/src/snapshots/type_checking/u8_negative_value.md
@@ -11,7 +11,7 @@ x : U8
 x = -1
 ~~~
 # EXPECTED
-NIL
+NEGATIVE UNSIGNED INTEGER - u8_negative_value.md:4:5:4:7
 # PROBLEMS
 **NEGATIVE UNSIGNED INTEGER**
 The number **-1** is **signed** because it is negative:
diff --git a/src/snapshots/type_comprehensive_scope.md b/src/snapshots/type_comprehensive_scope.md
index 7f859f1a61..761a5139b9 100644
--- a/src/snapshots/type_comprehensive_scope.md
+++ b/src/snapshots/type_comprehensive_scope.md
@@ -46,11 +46,68 @@ Complex : {
 ~~~
 # EXPECTED
 TYPE REDECLARED - type_comprehensive_scope.md:12:1:12:37
-UNDECLARED TYPE - type_comprehensive_scope.md:15:19:15:23
+type_comprehensive_scope.md:1:1:1:1: - type_comprehensive_scope.md:15:19:15:23
 TYPE REDECLARED - type_comprehensive_scope.md:24:1:24:13
-UNDECLARED TYPE - type_comprehensive_scope.md:27:11:27:29
+type_comprehensive_scope.md:9:1:9:33: - type_comprehensive_scope.md:27:11:27:29
 # PROBLEMS
-NIL
+**TYPE REDECLARED**
+The type ``Result`` is being redeclared.
+
+The redeclaration is here:
+**type_comprehensive_scope.md:12:1:12:37:**
+```roc
+Result(ok, err) : [Ok(ok), Err(err)]
+```
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+But ``Result`` was already declared here:
+**type_comprehensive_scope.md:1:1:1:1:**
+```roc
+module [MyU64, Person, Result, Tree, Node]
+```
+
+
+
+**UNDECLARED TYPE**
+The type ``Node`` is not declared in this scope.
+
+This type is referenced here:
+**type_comprehensive_scope.md:15:19:15:23:**
+```roc
+Tree(a) : [Branch(Node(a)), Leaf(a)]
+```
+                  ^^^^
+
+
+**TYPE REDECLARED**
+The type ``Person`` is being redeclared.
+
+The redeclaration is here:
+**type_comprehensive_scope.md:24:1:24:13:**
+```roc
+Person : U64
+```
+^^^^^^^^^^^^
+
+But ``Person`` was already declared here:
+**type_comprehensive_scope.md:9:1:9:33:**
+```roc
+Person : { name: Str, age: U64 }
+```
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``SomeUndeclaredType`` is not declared in this scope.
+
+This type is referenced here:
+**type_comprehensive_scope.md:27:11:27:29:**
+```roc
+BadType : SomeUndeclaredType
+```
+          ^^^^^^^^^^^^^^^^^^
+
+
 # TOKENS
 ~~~zig
 KwModule(1:1-1:7),OpenSquare(1:8-1:9),UpperIdent(1:9-1:14),Comma(1:14-1:15),UpperIdent(1:16-1:22),Comma(1:22-1:23),UpperIdent(1:24-1:30),Comma(1:30-1:31),UpperIdent(1:32-1:36),Comma(1:36-1:37),UpperIdent(1:38-1:42),CloseSquare(1:42-1:43),Newline(1:1-1:1),
diff --git a/src/snapshots/type_declarations.md b/src/snapshots/type_declarations.md
index 93d8046403..f95f7241e6 100644
--- a/src/snapshots/type_declarations.md
+++ b/src/snapshots/type_declarations.md
@@ -27,7 +27,50 @@ UNDECLARED TYPE - type_declarations.md:5:13:5:16
 UNDECLARED TYPE - type_declarations.md:7:19:7:21
 UNDECLARED TYPE - type_declarations.md:7:32:7:41
 # PROBLEMS
-NIL
+**UNDECLARED TYPE**
+The type ``Bar`` is not declared in this scope.
+
+This type is referenced here:
+**type_declarations.md:5:8:5:11:**
+```roc
+Foo : (Bar, Baz)
+```
+       ^^^
+
+
+**UNDECLARED TYPE**
+The type ``Baz`` is not declared in this scope.
+
+This type is referenced here:
+**type_declarations.md:5:13:5:16:**
+```roc
+Foo : (Bar, Baz)
+```
+            ^^^
+
+
+**UNDECLARED TYPE**
+The type ``Ok`` is not declared in this scope.
+
+This type is referenced here:
+**type_declarations.md:7:19:7:21:**
+```roc
+Some(a) : { foo : Ok(a), bar : Something }
+```
+                  ^^
+
+
+**UNDECLARED TYPE**
+The type ``Something`` is not declared in this scope.
+
+This type is referenced here:
+**type_declarations.md:7:32:7:41:**
+```roc
+Some(a) : { foo : Ok(a), bar : Something }
+```
+                               ^^^^^^^^^
+
+
 # TOKENS
 ~~~zig
 KwModule(1:1-1:7),OpenSquare(1:8-1:9),UpperIdent(1:9-1:12),Comma(1:12-1:13),UpperIdent(1:14-1:17),Comma(1:17-1:18),UpperIdent(1:19-1:23),Comma(1:23-1:24),UpperIdent(1:25-1:30),Comma(1:30-1:31),UpperIdent(1:32-1:40),Comma(1:40-1:41),LowerIdent(1:42-1:49),Comma(1:49-1:50),LowerIdent(1:51-1:56),CloseSquare(1:56-1:57),Newline(1:1-1:1),
diff --git a/src/snapshots/type_function_basic.md b/src/snapshots/type_function_basic.md
index b1e6d9e794..10a515bdf6 100644
--- a/src/snapshots/type_function_basic.md
+++ b/src/snapshots/type_function_basic.md
@@ -27,6 +27,14 @@ apply : (a -> b), a -> b
                 ^^^
 
 
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 # TOKENS
 ~~~zig
 KwApp(1:1-1:4),OpenSquare(1:5-1:6),LowerIdent(1:6-1:11),CloseSquare(1:11-1:12),OpenCurly(1:13-1:14),LowerIdent(1:15-1:17),OpColon(1:17-1:18),KwPlatform(1:19-1:27),StringStart(1:28-1:29),StringPart(1:29-1:50),StringEnd(1:50-1:51),CloseCurly(1:52-1:53),Newline(1:1-1:1),
diff --git a/src/snapshots/type_function_effectful.md b/src/snapshots/type_function_effectful.md
index 3e96142977..0ba795bfb7 100644
--- a/src/snapshots/type_function_effectful.md
+++ b/src/snapshots/type_function_effectful.md
@@ -40,6 +40,22 @@ runEffect! : (a => b), a => b
                          ^^^^
 
 
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 # TOKENS
 ~~~zig
 KwApp(1:1-1:4),OpenSquare(1:5-1:6),LowerIdent(1:6-1:11),CloseSquare(1:11-1:12),OpenCurly(1:13-1:14),LowerIdent(1:15-1:17),OpColon(1:17-1:18),KwPlatform(1:19-1:27),StringStart(1:28-1:29),StringPart(1:29-1:50),StringEnd(1:50-1:51),CloseCurly(1:52-1:53),Newline(1:1-1:1),
diff --git a/src/snapshots/type_function_multi_arg.md b/src/snapshots/type_function_multi_arg.md
index e99a8ed7b9..7467c85ab3 100644
--- a/src/snapshots/type_function_multi_arg.md
+++ b/src/snapshots/type_function_multi_arg.md
@@ -27,6 +27,14 @@ curry : (a, b -> c) -> (a -> b -> c)
                     ^^^^
 
 
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 # TOKENS
 ~~~zig
 KwApp(1:1-1:4),OpenSquare(1:5-1:6),LowerIdent(1:6-1:11),CloseSquare(1:11-1:12),OpenCurly(1:13-1:14),LowerIdent(1:15-1:17),OpColon(1:17-1:18),KwPlatform(1:19-1:27),StringStart(1:28-1:29),StringPart(1:29-1:50),StringEnd(1:50-1:51),CloseCurly(1:52-1:53),Newline(1:1-1:1),
diff --git a/src/snapshots/type_function_simple.md b/src/snapshots/type_function_simple.md
index 9e083e5519..75b8cbf29d 100644
--- a/src/snapshots/type_function_simple.md
+++ b/src/snapshots/type_function_simple.md
@@ -27,6 +27,14 @@ apply : (a -> b), a -> b
                 ^^^
 
 
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 # TOKENS
 ~~~zig
 KwApp(1:1-1:4),OpenSquare(1:5-1:6),LowerIdent(1:6-1:11),CloseSquare(1:11-1:12),OpenCurly(1:13-1:14),LowerIdent(1:15-1:17),OpColon(1:17-1:18),KwPlatform(1:19-1:27),StringStart(1:28-1:29),StringPart(1:29-1:50),StringEnd(1:50-1:51),CloseCurly(1:52-1:53),Newline(1:1-1:1),
diff --git a/src/snapshots/type_higher_order_multiple_vars.md b/src/snapshots/type_higher_order_multiple_vars.md
index b70e402d4c..dc34e4bbb8 100644
--- a/src/snapshots/type_higher_order_multiple_vars.md
+++ b/src/snapshots/type_higher_order_multiple_vars.md
@@ -14,7 +14,8 @@ main! = |_| {}
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - type_higher_order_multiple_vars.md:3:19:3:22
-expr_arrow_expects_ident - type_higher_order_multiple_vars.md:3:33:3:35
+PARSE ERROR - type_higher_order_multiple_vars.md:3:33:3:35
+UNEXPECTED TOKEN IN EXPRESSION - type_higher_order_multiple_vars.md:3:40:3:40
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **, (** is not expected in an expression.
@@ -52,6 +53,22 @@ compose : (b -> c), (a -> b) -> (a -> c)
                                        
 
 
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 # TOKENS
 ~~~zig
 KwApp(1:1-1:4),OpenSquare(1:5-1:6),LowerIdent(1:6-1:11),CloseSquare(1:11-1:12),OpenCurly(1:13-1:14),LowerIdent(1:15-1:17),OpColon(1:17-1:18),KwPlatform(1:19-1:27),StringStart(1:28-1:29),StringPart(1:29-1:50),StringEnd(1:50-1:51),CloseCurly(1:52-1:53),Newline(1:1-1:1),
diff --git a/src/snapshots/type_multiple_aliases.md b/src/snapshots/type_multiple_aliases.md
index 312c209210..ae3aba2ee0 100644
--- a/src/snapshots/type_multiple_aliases.md
+++ b/src/snapshots/type_multiple_aliases.md
@@ -24,7 +24,7 @@ main! = |_| {
 }
 ~~~
 # EXPECTED
-NIL
+TYPE MISMATCH - type_multiple_aliases.md:16:16:16:20
 # PROBLEMS
 **TYPE MISMATCH**
 This expression is used in an unexpected way:
diff --git a/src/snapshots/type_redeclaration_same_scope.md b/src/snapshots/type_redeclaration_same_scope.md
index 576d42b6fe..98610ed7dc 100644
--- a/src/snapshots/type_redeclaration_same_scope.md
+++ b/src/snapshots/type_redeclaration_same_scope.md
@@ -13,7 +13,24 @@ Maybe(a) : [Ok(a), Err]
 # EXPECTED
 TYPE REDECLARED - type_redeclaration_same_scope.md:4:1:4:24
 # PROBLEMS
-NIL
+**TYPE REDECLARED**
+The type ``Maybe`` is being redeclared.
+
+The redeclaration is here:
+**type_redeclaration_same_scope.md:4:1:4:24:**
+```roc
+Maybe(a) : [Ok(a), Err]
+```
+^^^^^^^^^^^^^^^^^^^^^^^
+
+But ``Maybe`` was already declared here:
+**type_redeclaration_same_scope.md:3:1:3:27:**
+```roc
+Maybe(a) : [Some(a), None]
+```
+^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+
 # TOKENS
 ~~~zig
 KwModule(1:1-1:7),OpenSquare(1:8-1:9),UpperIdent(1:9-1:14),CloseSquare(1:14-1:15),Newline(1:1-1:1),
diff --git a/src/snapshots/type_scope_integration.md b/src/snapshots/type_scope_integration.md
index bd3f961716..ce7bf951d0 100644
--- a/src/snapshots/type_scope_integration.md
+++ b/src/snapshots/type_scope_integration.md
@@ -21,9 +21,37 @@ Baz : Foo
 ~~~
 # EXPECTED
 TYPE REDECLARED - type_scope_integration.md:7:1:7:10
-UNDECLARED TYPE - type_scope_integration.md:10:7:10:25
+type_scope_integration.md:4:1:4:10: - type_scope_integration.md:10:7:10:25
 # PROBLEMS
-NIL
+**TYPE REDECLARED**
+The type ``Foo`` is being redeclared.
+
+The redeclaration is here:
+**type_scope_integration.md:7:1:7:10:**
+```roc
+Foo : Str
+```
+^^^^^^^^^
+
+But ``Foo`` was already declared here:
+**type_scope_integration.md:4:1:4:10:**
+```roc
+Foo : U64
+```
+^^^^^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``SomeUndeclaredType`` is not declared in this scope.
+
+This type is referenced here:
+**type_scope_integration.md:10:7:10:25:**
+```roc
+Bar : SomeUndeclaredType
+```
+      ^^^^^^^^^^^^^^^^^^
+
+
 # TOKENS
 ~~~zig
 KwModule(1:1-1:7),OpenSquare(1:8-1:9),UpperIdent(1:9-1:12),Comma(1:12-1:13),UpperIdent(1:14-1:17),CloseSquare(1:17-1:18),Newline(1:1-1:1),
diff --git a/src/snapshots/type_shadowing_across_scopes.md b/src/snapshots/type_shadowing_across_scopes.md
index 78ed8ddc64..8baa399a58 100644
--- a/src/snapshots/type_shadowing_across_scopes.md
+++ b/src/snapshots/type_shadowing_across_scopes.md
@@ -19,12 +19,12 @@ InnerModule : {
 }
 ~~~
 # EXPECTED
-expected_type_field_name - type_shadowing_across_scopes.md:11:5:11:13
-expected_ty_close_curly_or_comma - type_shadowing_across_scopes.md:11:24:11:32
+PARSE ERROR - type_shadowing_across_scopes.md:11:5:11:13
+PARSE ERROR - type_shadowing_across_scopes.md:11:24:11:32
+UNEXPECTED TOKEN IN EXPRESSION - type_shadowing_across_scopes.md:11:31:11:31
 UNEXPECTED TOKEN IN EXPRESSION - type_shadowing_across_scopes.md:12:1:12:2
 TYPE REDECLARED - type_shadowing_across_scopes.md:3:1:3:31
-MALFORMED TYPE - type_shadowing_across_scopes.md:11:24:11:32
-UNUSED VARIABLE - type_shadowing_across_scopes.md:6:16:6:20
+type_shadowing_across_scopes.md:1:1:1:1: - type_shadowing_across_scopes.md:6:16:6:20
 # PROBLEMS
 **PARSE ERROR**
 A parsing error occurred: `expected_type_field_name`
@@ -74,6 +74,47 @@ Here is the problematic code:
 ^
 
 
+**TYPE REDECLARED**
+The type ``Result`` is being redeclared.
+
+The redeclaration is here:
+**type_shadowing_across_scopes.md:3:1:3:31:**
+```roc
+Result(a, b) : [Ok(a), Err(b)]
+```
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+But ``Result`` was already declared here:
+**type_shadowing_across_scopes.md:1:1:1:1:**
+```roc
+module [Result, processData]
+```
+
+
+
+**MALFORMED TYPE**
+This type annotation is malformed or contains invalid syntax.
+
+**UNUSED VARIABLE**
+Variable ``data`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_data` to suppress this warning.
+The unused variable is declared here:
+**type_shadowing_across_scopes.md:6:16:6:20:**
+```roc
+processData = |data|
+```
+               ^^^^
+
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
+**INVALID STATEMENT**
+The statement **expression** is not allowed at the top level.
+Only definitions, type annotations, and imports are allowed at the top level.
+
 # TOKENS
 ~~~zig
 KwModule(1:1-1:7),OpenSquare(1:8-1:9),UpperIdent(1:9-1:15),Comma(1:15-1:16),LowerIdent(1:17-1:28),CloseSquare(1:28-1:29),Newline(1:1-1:1),
diff --git a/src/snapshots/type_tag_union_basic.md b/src/snapshots/type_tag_union_basic.md
index ad6753583e..bf5fe5d7f2 100644
--- a/src/snapshots/type_tag_union_basic.md
+++ b/src/snapshots/type_tag_union_basic.md
@@ -15,7 +15,18 @@ main! = |_| {}
 # EXPECTED
 UNUSED VARIABLE - type_tag_union_basic.md:4:12:4:17
 # PROBLEMS
-NIL
+**UNUSED VARIABLE**
+Variable ``maybe`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_maybe` to suppress this warning.
+The unused variable is declared here:
+**type_tag_union_basic.md:4:12:4:17:**
+```roc
+process = |maybe| "result"
+```
+           ^^^^^
+
+
 # TOKENS
 ~~~zig
 KwApp(1:1-1:4),OpenSquare(1:5-1:6),LowerIdent(1:6-1:11),CloseSquare(1:11-1:12),OpenCurly(1:13-1:14),LowerIdent(1:15-1:17),OpColon(1:17-1:18),KwPlatform(1:19-1:27),StringStart(1:28-1:29),StringPart(1:29-1:50),StringEnd(1:50-1:51),CloseCurly(1:52-1:53),Newline(1:1-1:1),
diff --git a/src/snapshots/type_tag_union_complex.md b/src/snapshots/type_tag_union_complex.md
index a38fd90e00..1c78d63712 100644
--- a/src/snapshots/type_tag_union_complex.md
+++ b/src/snapshots/type_tag_union_complex.md
@@ -33,7 +33,24 @@ main! = |_| {}
 # EXPECTED
 TYPE REDECLARED - type_tag_union_complex.md:7:1:7:55
 # PROBLEMS
-NIL
+**TYPE REDECLARED**
+The type ``Result`` is being redeclared.
+
+The redeclaration is here:
+**type_tag_union_complex.md:7:1:7:55:**
+```roc
+Result : [Success(Str), Error(Str), Warning(Str, I32)]
+```
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+But ``Result`` was already declared here:
+**type_tag_union_complex.md:1:1:1:1:**
+```roc
+app [main!] { pf: platform "../basic-cli/main.roc" }
+```
+
+
+
 # TOKENS
 ~~~zig
 KwApp(1:1-1:4),OpenSquare(1:5-1:6),LowerIdent(1:6-1:11),CloseSquare(1:11-1:12),OpenCurly(1:13-1:14),LowerIdent(1:15-1:17),OpColon(1:17-1:18),KwPlatform(1:19-1:27),StringStart(1:28-1:29),StringPart(1:29-1:50),StringEnd(1:50-1:51),CloseCurly(1:52-1:53),Newline(1:1-1:1),
diff --git a/src/snapshots/type_undeclared_usage.md b/src/snapshots/type_undeclared_usage.md
index c5cbe30741..ea99948e92 100644
--- a/src/snapshots/type_undeclared_usage.md
+++ b/src/snapshots/type_undeclared_usage.md
@@ -21,7 +21,40 @@ UNDECLARED TYPE - type_undeclared_usage.md:3:10:3:21
 UNDECLARED TYPE - type_undeclared_usage.md:5:16:5:32
 UNUSED VARIABLE - type_undeclared_usage.md:6:17:6:22
 # PROBLEMS
-NIL
+**UNDECLARED TYPE**
+The type ``UnknownType`` is not declared in this scope.
+
+This type is referenced here:
+**type_undeclared_usage.md:3:10:3:21:**
+```roc
+MyType : UnknownType
+```
+         ^^^^^^^^^^^
+
+
+**UNDECLARED TYPE**
+The type ``UndeclaredResult`` is not declared in this scope.
+
+This type is referenced here:
+**type_undeclared_usage.md:5:16:5:32:**
+```roc
+processValue : UndeclaredResult -> Str
+```
+               ^^^^^^^^^^^^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``value`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_value` to suppress this warning.
+The unused variable is declared here:
+**type_undeclared_usage.md:6:17:6:22:**
+```roc
+processValue = |value| {
+```
+                ^^^^^
+
+
 # TOKENS
 ~~~zig
 KwModule(1:1-1:7),OpenSquare(1:8-1:9),UpperIdent(1:9-1:15),Comma(1:15-1:16),LowerIdent(1:17-1:29),CloseSquare(1:29-1:30),Newline(1:1-1:1),
diff --git a/src/snapshots/type_var_multiple.md b/src/snapshots/type_var_multiple.md
index 9412bef7d3..af6bcddf9e 100644
--- a/src/snapshots/type_var_multiple.md
+++ b/src/snapshots/type_var_multiple.md
@@ -18,10 +18,6 @@ main! = |_| {}
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - type_var_multiple.md:6:21:6:27
-UNDEFINED VARIABLE - type_var_multiple.md:6:6:6:11
-UNDEFINED VARIABLE - type_var_multiple.md:6:13:6:19
-UNDEFINED VARIABLE - type_var_multiple.md:7:6:7:12
-UNDEFINED VARIABLE - type_var_multiple.md:7:14:7:19
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **= pair** is not expected in an expression.
@@ -35,6 +31,22 @@ Here is the problematic code:
                     ^^^^^^
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `first` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `second` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `second` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `first` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 KwApp(1:1-1:4),OpenSquare(1:5-1:6),LowerIdent(1:6-1:11),CloseSquare(1:11-1:12),OpenCurly(1:13-1:14),LowerIdent(1:15-1:17),OpColon(1:17-1:18),KwPlatform(1:19-1:27),StringStart(1:28-1:29),StringPart(1:29-1:54),StringEnd(1:54-1:55),CloseCurly(1:56-1:57),Newline(1:1-1:1),
diff --git a/src/snapshots/type_var_namespace.md b/src/snapshots/type_var_namespace.md
index df6f63e5d4..8c23a72a0d 100644
--- a/src/snapshots/type_var_namespace.md
+++ b/src/snapshots/type_var_namespace.md
@@ -24,8 +24,6 @@ main! = |_| {}
 ~~~
 # EXPECTED
 UNEXPECTED TOKEN IN EXPRESSION - type_var_namespace.md:11:31:11:40
-UNDEFINED VARIABLE - type_var_namespace.md:11:14:11:24
-UNDEFINED VARIABLE - type_var_namespace.md:11:34:11:52
 # PROBLEMS
 **UNEXPECTED TOKEN IN EXPRESSION**
 The token **|> Result** is not expected in an expression.
@@ -39,6 +37,14 @@ Here is the problematic code:
                               ^^^^^^^^^
 
 
+**UNDEFINED VARIABLE**
+Nothing is named `first` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
+**UNDEFINED VARIABLE**
+Nothing is named `withDefault` in this scope.
+Is there an `import` or `exposing` missing up-top?
+
 # TOKENS
 ~~~zig
 KwApp(1:1-1:4),OpenSquare(1:5-1:6),LowerIdent(1:6-1:11),CloseSquare(1:11-1:12),OpenCurly(1:13-1:14),LowerIdent(1:15-1:17),OpColon(1:17-1:18),KwPlatform(1:19-1:27),StringStart(1:28-1:29),StringPart(1:29-1:54),StringEnd(1:54-1:55),CloseCurly(1:56-1:57),Newline(1:1-1:1),
diff --git a/src/snapshots/unicode_single_quotes.md b/src/snapshots/unicode_single_quotes.md
index c35b143822..94d65161e4 100644
--- a/src/snapshots/unicode_single_quotes.md
+++ b/src/snapshots/unicode_single_quotes.md
@@ -18,13 +18,28 @@ type=expr
 )
 ~~~
 # EXPECTED
-too_long_single_quote - unicode_single_quotes.md:6:5:6:16
-too_long_single_quote - unicode_single_quotes.md:7:5:7:15
-empty_single_quote - unicode_single_quotes.md:8:5:8:7
-too_long_single_quote - unicode_single_quotes.md:9:5:9:14
-too_long_single_quote - unicode_single_quotes.md:10:5:10:12
-# PROBLEMS
 NIL
+# PROBLEMS
+**INVALID SCALAR**
+I am part way through parsing this scalar literal (character literal), but it contains more than one character.
+A single-quoted literal must contain exactly one character, e.g. 'a'.
+
+**INVALID SCALAR**
+I am part way through parsing this scalar literal (character literal), but it contains more than one character.
+A single-quoted literal must contain exactly one character, e.g. 'a'.
+
+**INVALID SCALAR**
+I am part way through parsing this scalar literal (character literal), but it is empty.
+A single-quoted literal must contain exactly one character, e.g. 'a'.
+
+**INVALID SCALAR**
+I am part way through parsing this scalar literal (character literal), but it contains more than one character.
+A single-quoted literal must contain exactly one character, e.g. 'a'.
+
+**INVALID SCALAR**
+I am part way through parsing this scalar literal (character literal), but it contains more than one character.
+A single-quoted literal must contain exactly one character, e.g. 'a'.
+
 # TOKENS
 ~~~zig
 OpenRound(1:1-1:2),Newline(1:1-1:1),
diff --git a/src/snapshots/unused_vars_block.md b/src/snapshots/unused_vars_block.md
index 5c6706d343..218c48c06f 100644
--- a/src/snapshots/unused_vars_block.md
+++ b/src/snapshots/unused_vars_block.md
@@ -29,7 +29,30 @@ main! = |_| {
 UNUSED VARIABLE - unused_vars_block.md:5:5:5:15
 UNUSED VARIABLE - unused_vars_block.md:11:5:11:19
 # PROBLEMS
-NIL
+**UNUSED VARIABLE**
+Variable ``unused_var`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_unused_var` to suppress this warning.
+The unused variable is declared here:
+**unused_vars_block.md:5:5:5:15:**
+```roc
+    unused_var = 42
+```
+    ^^^^^^^^^^
+
+
+**UNUSED VARIABLE**
+Variable ``another_unused`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_another_unused` to suppress this warning.
+The unused variable is declared here:
+**unused_vars_block.md:11:5:11:19:**
+```roc
+    another_unused = "hello"
+```
+    ^^^^^^^^^^^^^^
+
+
 # TOKENS
 ~~~zig
 KwApp(1:1-1:4),OpenSquare(1:5-1:6),LowerIdent(1:6-1:11),CloseSquare(1:11-1:12),OpenCurly(1:13-1:14),LowerIdent(1:15-1:17),OpColon(1:17-1:18),KwPlatform(1:19-1:27),StringStart(1:28-1:29),StringPart(1:29-1:50),StringEnd(1:50-1:51),CloseCurly(1:52-1:53),Newline(1:1-1:1),
diff --git a/src/snapshots/unused_vars_simple.md b/src/snapshots/unused_vars_simple.md
index 96fb5667a4..6e674f97fc 100644
--- a/src/snapshots/unused_vars_simple.md
+++ b/src/snapshots/unused_vars_simple.md
@@ -29,9 +29,32 @@ main! = |_| {
 ~~~
 # EXPECTED
 UNUSED VARIABLE - unused_vars_simple.md:4:19:4:20
-used_underscore_variable - unused_vars_simple.md:7:28:7:34
+UNDERSCORE VARIABLE USED - unused_vars_simple.md:7:28:7:34
 # PROBLEMS
-NIL
+**UNUSED VARIABLE**
+Variable ``x`` is not used anywhere in your code.
+
+If you don't need this variable, prefix it with an underscore like `_x` to suppress this warning.
+The unused variable is declared here:
+**unused_vars_simple.md:4:19:4:20:**
+```roc
+unused_regular = |x| 42
+```
+                  ^
+
+
+**UNDERSCORE VARIABLE USED**
+Variable ``_value`` is prefixed with an underscore but is actually used.
+
+Variables prefixed with `_` are intended to be unused. Remove the underscore prefix: `value`.
+The underscore variable is declared here:
+**unused_vars_simple.md:7:28:7:34:**
+```roc
+used_underscore = |_value| _value
+```
+                           ^^^^^^
+
+
 # TOKENS
 ~~~zig
 KwApp(1:1-1:4),OpenSquare(1:5-1:6),LowerIdent(1:6-1:11),CloseSquare(1:11-1:12),OpenCurly(1:13-1:14),LowerIdent(1:15-1:17),OpColon(1:17-1:18),KwPlatform(1:19-1:27),StringStart(1:28-1:29),StringPart(1:29-1:50),StringEnd(1:50-1:51),CloseCurly(1:52-1:53),Newline(1:1-1:1),
diff --git a/src/update_expected.zig b/src/update_expected.zig
new file mode 100644
index 0000000000..62859dcc78
--- /dev/null
+++ b/src/update_expected.zig
@@ -0,0 +1,331 @@
+const std = @import("std");
+const base = @import("base.zig");
+
+const verbose_log = false;
+
+fn log(comptime fmt: []const u8, args: anytype) void {
+    if (verbose_log) {
+        std.debug.print("[update_expected] " ++ fmt ++ "\n", args);
+    }
+}
+
+/// Represents a problem entry from PROBLEMS section
+const ProblemEntry = struct {
+    problem_type: []const u8,
+    file: []const u8,
+    start_line: u32,
+    start_col: u32,
+    end_line: u32,
+    end_col: u32,
+
+    fn format(self: ProblemEntry, writer: anytype) !void {
+        try writer.print("{s} - {s}:{d}:{d}:{d}:{d}", .{
+            self.problem_type,
+            self.file,
+            self.start_line,
+            self.start_col,
+            self.end_line,
+            self.end_col,
+        });
+    }
+};
+
+/// Extract section content between headers
+fn extractSection(content: []const u8, section_name: []const u8) ?struct { content: []const u8, start: usize, end: usize } {
+    var header_buf: [256]u8 = undefined;
+    const header = std.fmt.bufPrint(&header_buf, "# {s}\n", .{section_name}) catch return null;
+    const start_idx = std.mem.indexOf(u8, content, header) orelse return null;
+    const content_start = start_idx + header.len;
+
+    // Find the next section header
+    var next_section_idx = content.len;
+    var search_idx = content_start;
+    while (search_idx < content.len - 2) {
+        if (content[search_idx] == '\n' and
+            content[search_idx + 1] == '#' and
+            content[search_idx + 2] == ' ')
+        {
+            next_section_idx = search_idx + 1;
+            break;
+        }
+        search_idx += 1;
+    }
+
+    return .{
+        .content = std.mem.trim(u8, content[content_start..next_section_idx], " \t\r\n"),
+        .start = start_idx,
+        .end = next_section_idx,
+    };
+}
+
+/// Parse a PROBLEMS entry to extract problem type and location
+fn parseProblemEntry(allocator: std.mem.Allocator, content: []const u8, start_idx: usize) !?struct { entry: ?ProblemEntry, next_idx: usize } {
+    var idx = start_idx;
+
+    // Skip to next problem header
+    while (idx < content.len) {
+        if (idx + 2 <= content.len and std.mem.eql(u8, content[idx .. idx + 2], "**")) {
+            break;
+        }
+        idx += 1;
+    }
+
+    if (idx >= content.len) return null;
+
+    // Find the end of the problem type
+    const type_start = idx + 2;
+    const type_end_search = std.mem.indexOfPos(u8, content, type_start, "**");
+    if (type_end_search == null) return null;
+    const type_end = type_end_search.?;
+    const problem_type = std.mem.trim(u8, content[type_start..type_end], " \t\r\n");
+
+    // Look for the location pattern **file:line:col:line:col:**
+    var search_idx = type_end + 2;
+    while (search_idx < content.len) {
+        if (search_idx + 2 <= content.len and std.mem.eql(u8, content[search_idx .. search_idx + 2], "**")) {
+            const loc_start = search_idx + 2;
+            const loc_end_search = std.mem.indexOfPos(u8, content, loc_start, ":**");
+            if (loc_end_search) |loc_end| {
+                const location = content[loc_start..loc_end];
+
+                // Check if this looks like a location (has 4 colons)
+                var colon_count: usize = 0;
+                for (location) |c| {
+                    if (c == ':') colon_count += 1;
+                }
+
+                if (colon_count == 4) {
+                    // This is a location, parse it
+                    var parts = std.mem.tokenizeScalar(u8, location, ':');
+
+                    const file = parts.next() orelse {
+                        search_idx = loc_end + 3;
+                        continue;
+                    };
+                    const start_line_str = parts.next() orelse {
+                        search_idx = loc_end + 3;
+                        continue;
+                    };
+                    const start_col_str = parts.next() orelse {
+                        search_idx = loc_end + 3;
+                        continue;
+                    };
+                    const end_line_str = parts.next() orelse {
+                        search_idx = loc_end + 3;
+                        continue;
+                    };
+                    const end_col_str = parts.next() orelse {
+                        search_idx = loc_end + 3;
+                        continue;
+                    };
+
+                    // Try to parse numbers
+                    const start_line = std.fmt.parseInt(u32, start_line_str, 10) catch {
+                        search_idx = loc_end + 3;
+                        continue;
+                    };
+                    const start_col = std.fmt.parseInt(u32, start_col_str, 10) catch {
+                        search_idx = loc_end + 3;
+                        continue;
+                    };
+                    const end_line = std.fmt.parseInt(u32, end_line_str, 10) catch {
+                        search_idx = loc_end + 3;
+                        continue;
+                    };
+                    const end_col = std.fmt.parseInt(u32, end_col_str, 10) catch {
+                        search_idx = loc_end + 3;
+                        continue;
+                    };
+
+                    const entry = ProblemEntry{
+                        .problem_type = try allocator.dupe(u8, problem_type),
+                        .file = try allocator.dupe(u8, file),
+                        .start_line = start_line,
+                        .start_col = start_col,
+                        .end_line = end_line,
+                        .end_col = end_col,
+                    };
+
+                    return .{ .entry = entry, .next_idx = loc_end + 3 };
+                }
+            }
+        }
+        search_idx += 1;
+    }
+
+    // No location found for this problem type, move to end of content
+    return .{ .entry = null, .next_idx = content.len };
+}
+
+/// Parse all problems from PROBLEMS section
+fn parseProblemsSection(allocator: std.mem.Allocator, content: []const u8) !std.ArrayList(ProblemEntry) {
+    var problems = std.ArrayList(ProblemEntry).init(allocator);
+    errdefer {
+        for (problems.items) |p| {
+            allocator.free(p.problem_type);
+            allocator.free(p.file);
+        }
+        problems.deinit();
+    }
+
+    if (std.mem.eql(u8, std.mem.trim(u8, content, " \t\r\n"), "NIL")) {
+        return problems;
+    }
+
+    var idx: usize = 0;
+    while (idx < content.len) {
+        const result = try parseProblemEntry(allocator, content, idx);
+        if (result) |r| {
+            if (r.entry) |entry| {
+                try problems.append(entry);
+            }
+            idx = r.next_idx;
+        } else {
+            break;
+        }
+    }
+
+    return problems;
+}
+
+/// Generate EXPECTED content from problems
+fn generateExpectedContent(allocator: std.mem.Allocator, problems: []const ProblemEntry) ![]const u8 {
+    if (problems.len == 0) {
+        return try allocator.dupe(u8, "NIL");
+    }
+
+    var buffer = std.ArrayList(u8).init(allocator);
+    errdefer buffer.deinit();
+
+    for (problems, 0..) |problem, i| {
+        if (i > 0) {
+            try buffer.append('\n');
+        }
+        try problem.format(buffer.writer());
+    }
+
+    return buffer.toOwnedSlice();
+}
+
+/// Update a single snapshot file
+fn updateSnapshotFile(allocator: std.mem.Allocator, path: []const u8) !bool {
+    const content = try std.fs.cwd().readFileAlloc(allocator, path, 1024 * 1024);
+    defer allocator.free(content);
+
+    // Extract PROBLEMS section
+    const problems_info = extractSection(content, "PROBLEMS");
+    if (problems_info == null) {
+        log("No PROBLEMS section found in {s}", .{path});
+        return false;
+    }
+
+    // Parse problems
+    var problems = try parseProblemsSection(allocator, problems_info.?.content);
+    defer {
+        for (problems.items) |p| {
+            allocator.free(p.problem_type);
+            allocator.free(p.file);
+        }
+        problems.deinit();
+    }
+
+    // Generate new EXPECTED content
+    const expected_content = try generateExpectedContent(allocator, problems.items);
+    defer allocator.free(expected_content);
+
+    // Find or create EXPECTED section
+    const expected_info = extractSection(content, "EXPECTED");
+
+    var new_content = std.ArrayList(u8).init(allocator);
+    defer new_content.deinit();
+
+    if (expected_info) |info| {
+        // Replace existing EXPECTED section
+        try new_content.appendSlice(content[0..info.start]);
+        try new_content.appendSlice("# EXPECTED\n");
+        try new_content.appendSlice(expected_content);
+        try new_content.append('\n');
+        try new_content.appendSlice(content[info.end..]);
+    } else {
+        // Insert EXPECTED section after SOURCE section
+        const source_info = extractSection(content, "SOURCE");
+        if (source_info == null) {
+            log("No SOURCE section found in {s}", .{path});
+            return false;
+        }
+
+        // Find the end of the SOURCE section (including closing ~~~)
+        var source_end = source_info.?.end;
+        // Back up to find the ~~~ line
+        var idx = source_info.?.start + "# SOURCE\n".len;
+        while (idx < content.len) {
+            if (idx + 3 < content.len and std.mem.eql(u8, content[idx .. idx + 3], "~~~")) {
+                // Find the end of this line
+                var line_end = idx + 3;
+                while (line_end < content.len and content[line_end] != '\n') {
+                    line_end += 1;
+                }
+                if (line_end < content.len) {
+                    line_end += 1; // Include the newline
+                }
+                source_end = line_end;
+                break;
+            }
+            idx += 1;
+        }
+
+        try new_content.appendSlice(content[0..source_end]);
+        try new_content.appendSlice("# EXPECTED\n");
+        try new_content.appendSlice(expected_content);
+        try new_content.append('\n');
+        try new_content.appendSlice(content[source_end..]);
+    }
+
+    // Write the updated content back
+    const file = try std.fs.cwd().createFile(path, .{});
+    defer file.close();
+    try file.writeAll(new_content.items);
+
+    return true;
+}
+
+fn processPath(allocator: std.mem.Allocator, path: []const u8) !u32 {
+    var count: u32 = 0;
+
+    var dir = try std.fs.cwd().openDir(path, .{ .iterate = true });
+    defer dir.close();
+
+    var walker = try dir.walk(allocator);
+    defer walker.deinit();
+
+    while (try walker.next()) |entry| {
+        if (entry.kind == .file and std.mem.endsWith(u8, entry.path, ".md")) {
+            const full_path = try std.fs.path.join(allocator, &.{ path, entry.path });
+            defer allocator.free(full_path);
+
+            if (try updateSnapshotFile(allocator, full_path)) {
+                count += 1;
+                std.debug.print("Updated: {s}\n", .{full_path});
+            }
+        }
+    }
+
+    return count;
+}
+
+pub fn main() !void {
+    var gpa = std.heap.GeneralPurposeAllocator(.{}){};
+    defer _ = gpa.deinit();
+    const allocator = gpa.allocator();
+
+    const args = try std.process.argsAlloc(allocator);
+    defer std.process.argsFree(allocator, args);
+
+    const path = if (args.len > 1) args[1] else "src/snapshots";
+
+    std.debug.print("Updating EXPECTED sections based on PROBLEMS in: {s}\n", .{path});
+
+    const count = try processPath(allocator, path);
+
+    std.debug.print("\nUpdated {} snapshot files\n", .{count});
+}